Integer

Common datatype in many programming languages for representing a whole number

Unsigned

An unsigned variable is a variable that can only represent non-negative numbers.



Type types data

Example

"The documentation for glibc stays they are integer types no narrower than unsigned int but i m not finding a standards reference that says they have to be an integer type see also time_t"

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Are dev_t and ino_t required to be integer types?

"The fact that you can input integer data doesn t change that - the data is converted to floating-point on the fly;the normalized parameter controls how the conversion is done if it is enabled the range of the input type is mapped to the normalized 0 1 for unsigned types also called unorm ing the gl or -1 1 for signed types also called snorm if it is disabled the value is directly converted to the nearest floating-point value of the input integer"

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Why do different variations of glVertexAttribPointer exist?

Positive larger integers

Example

"The warning is not issued if signed integer is of larger size than the unsigned integer in this case the unsigned integer is converted to larger signed integer and fits into positive range of the larger type"

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Cython giving 'unnecessary' warning

"Decrementing a signed integer i not incrementing it and accessing until i overflows to a positive value;using unsigned integers is generally better if you do not need to hold negative values"

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AT91SAM7X512's SPI peripheral gets disabled on write to SPI_TDR

"It s interesting and probably relevant that the value is larger than an unsigned 64 bit integer but since the value is a string this is theoretically legal"

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How do I correctly save a google user in google datastore using objectify?

"32-bit integers hold up to 4 billion and some unsigned and only 2 billion and some signed;the number you are converting to an integer is much larger than that"

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String to int cast php change value

Operand type rank

Example

"An implementation that has no such unsigned type say because pointers are bigger than any integer type won t provide it"

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How can I check a certain type is already defined in C compiler?

"When performing addition the usual arithmetic conversions are performed on the operands which state expr 11.5.3 otherwise if the operand that has unsigned integer type has rank greater than or equal to the rank of the type of the other operand the operand with signed integer type shall be converted to the type of the operand with unsigned integer type"

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What happens if I add an unsigned int to a negative int and the arithmetic result is positive?

"Otherwise if the operand that has unsigned integer type has rank greater than or equal to the rank of the type of the other operand the operand with signed integer type shall be converted to the type of the operand with unsigned integer type"

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C++ size_t modulus operation with negative operand

"And ...if the operand that has unsigned integer type has rank greater or equal to the rank of the type of the other operand then the operand with signed integer type is converted to the type of the operand with unsigned integer type"

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C unsigned int + int

"1.5.3 otherwise if the operand that has unsigned integer type has rank greater than or equal to the rank of the type of the other operand the operand with signed integer type shall be converted to the type of the operand with unsigned integer type"

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C++ Unexpected Integer Promotion

"Otherwise if the operand that has unsigned integer type has rank greater or equal to the rank of the type of the other operand then the operand with signed integer type is converted to the type of the operand with unsigned integer type"

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Different results between a 16-bit int machine and a 32-bit int machine in a subtraction

"If the operand that has unsigned integer type has rank greater or"

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Why is a negative long value greater than a positive unsigned long value?

"The explanation why there would be type promotion here when comparing from standard 6.3.1.8 otherwise if the operand that has unsigned integer type has rank greater or equal to the rank of the type of the other operand then the operand with signed integer type is converted to the type of the operand with unsigned integer type"

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Why should be there the involvement of type promotion in this code?

"Otherwise if the operand that has unsigned integer type has rank greater or equal to the rank of the type of the other operand then the operand with"

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Arithmetic and Bitwise manipulation of sized ints in C

"Your problem by default your int gets promoted to an unsigned int according to the usual arithmetic conversions ... if the operand that has unsigned integer type has rank greater or equal to the rank of the type of the other operand then the operand with signed integer type is converted to the type of the operand with unsigned integer type"

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C unsigned int + int

"If the operand that has unsigned integer type has rank greater than or equal to the rank of the type of the other operand the operand with signed integer type is converted to the type of the operand with unsigned integer type"

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Implicit type conversion rules in C++ operators

"This is the result of an integer promotion rule described in c99 standard section 6.3.1.8 if the operand that has unsigned integer type has rank greater or equal to the rank of the type of the other operand then the operand with signed integer type is converted to the type of the operand with unsigned integer type"

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Why is a negative long value greater than a positive unsigned long value?

"Reference 1.5.3 otherwise if the operand that has unsigned integer type has rank greater than or equal to the rank of the type of the other operand the operand with signed integer type shall be converted to the type of the operand with unsigned integer type"

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What is actual value of variable t of type size_t when it is assigned negative value?(can be unsigned int instead of size_t)

"The integer promotions are if a type is wider 1 than unsigned int it is not changed"

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Arithmetic operations on unsigned variables produce signed values, is it standard behavior?

"An object with an integer type other than int and signed int whose integer rank is less than or equal to the rank of int and unsigned int a bit field of type _bool int signed int or unsigned int"

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Integer conversions(narrowing, widening), undefined behaviour

"Here is how gcc does gcc gcc sign extends if the integer type is larger than a pointer type this ll happen regardless of the integer being signed or unsigned just because that s how gcc decided to implement gcc"

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Unexpected sign extension of int32 or 32bit pointer when converted to uint64

"Error integer constant is larger than the largest unsigned integer type"

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Why is this unsigned int holding more data than it has memory for?

"If x is of an unsigned integer type that is at least as large as unsigned int and y is less than the number of bits in x s type then the above partial statement will test whether bits in x that aren t in the top y are set"

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Using bit shifting variables inside if statement - error or not

"The c99 and later standards however wouldn t require that implementations usefully process any situation in which x is non-zero but the expression would yield zero unless x is an unsigned integer type at least as large as unsigned int"

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Using bit shifting variables inside if statement - error or not

"It can only disappoint you if your compiler has an integer type wider than unsigned long long and you use it"

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Compatibility of vsnprintf and the macros from inttypes

"6.3.1.8 describes these conversions ... otherwise if the operand that has unsigned integer type has rank greater or equal to the rank of the type of the other operand then the operand with signed integer type is converted to the type of the operand with unsigned integer type. ... you can hunt through the standard for similar justification for returning -1 for a function returning a signed type but it s basically the same argument so i won t bother. in other words yes this is perfectly correct"

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Function return type is unsigned while it returns -1 for error

"If the operand that has unsigned integer type has rank greater than"

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C programming: Division in an if-statement

"An unsigned 64-bit integer type requires compiler support which your compiler lacks so you cannot create your compiler sorry"

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Reproduce UInt64 in Delphi 3

Size sizes bigger

Example

"1 size_type is nothing more than an unsigned integer which is commonly used as a type for sizes since an unsigned integer cannot have a negative value except zero 0 being a plus-minus number which is still allowed."

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How to use string find_first_of buffer form (size_t n parameter)

"It might even be bigger than any integer type but if there is some integer type which is the right size and you that integer type will be typedef d to intptr_t and intptr_t unsigned version probably more useful will be uintptr_t"

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What is printing out when int pointer is printed with %d?

"A file size of 2gb if represented as a 32-bit integer would appear negative though it obviously isn t;it may well mean that file sizes in posix should be treated as unsigned integers not signed"

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Can file size be a negative number? Why?

"Given integer conversion rules of the language the shown expression would appear to be well-defined if the type of 5 were a signed type of no larger size than unsigned long long and in that case the pointed element would be"

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Shouldn't this give an out-of-bounds warning?

"Both of following types are semantically equivalent minimum 64bit integer without sign and with equal or bigger size than unsigned long int"

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Unsigned long long VS unsigned long long int

Faster types division

Example

"In case of unsigned integer division this problem does not arise which is why generally integer division works much faster for unsigned types than for signed types"

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Compiler optimization on marking an int unsigned?

"Furthermore signed integer types just tend to be more useful than unsigned types"

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Signed as default in C

"The idea here is threefold readability using operator functions with compatible left and right arguments as well as return value and the use of integer multiplying operators being faster than unsigned operators"

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What VHDL libraries to use for decimal modulus

Promotions smaller int

Example

"Instead default argument promotions take place which means that any integer type smaller than int unsigned int gets converted to one of those -- that s not the only promotion but the only one relevant here -- and which also means that there is no automatic conversion to whatever type you specify with va_arg"

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How to determine the end of va_arg list?

"The rules for integer promotions will convert any integer with a conversion rank less than int unsigned as well as bit-fields into the an int unsigned"

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Are there better ways to ease this warning?

"In the case of integer arguments this means integer promotions which means that all integer types smaller than int are converted to int or unsigned int"

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Printf a literal number (int) while expecting a shorter number

"Unsigned types at least as wide as unsigned int do not undergo integer promotions so arithmetic and logical operations on them is applied in their own type for which johan lundberg s answer applies that s specified to be performed modulo 2 n"

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Negative size_t

Promotions variable foo

Example

"1 as chux has noted in a comment if unsigned is larger than uint32_t arithmetic on uint32_t goes through the usual integer promotions and if not it stays as uint32_t"

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Why would uint32_t be preferred rather than uint_fast32_t?

"He variable foo will get promoted using integer promotions 3;the variable foo will get promoted to type int because type int can represent all values of type size_t and rank of size_t being a synonym for unsigned short is lower than the rank of int"

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Adding or assigning an integer literal to a size_t

Greater good idea

Example

"Not that i think this is a good idea but in c at least you can check if your unsigned integer is greater than int_max for two s complement anyway not so sure about the sign magnitude and one s complement variants but they re probably rare enough that you could safely ignore they until a problem pops up"

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Using an unsigned int to terminate a while() loop

"Your loop continues while but an unsigned integer is always greater than or equal to zero"

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For loop using uint64 won't stop

Negative can not

Example

"A signed integer can represent negative numbers;unsigned cannot"

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What does signed and unsigned values mean?

"One other thing worth pointing out is the a signed integer can take one negative value more than it can positive which has a consequence for rounding when using integer to represent fixed point numbers for example but am sure that s better covered in the dsp or signal processing forums;as the name suggests signed integers can be negative and unsigned cannot be"

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Why declare "score[11] = {};" and "grade" as "unsigned" instead of "int'

"If we take a look at this so post we can see what unsigned values actually means quoting what pubby has said in the so post i just linked above we can understand a signed integer can represent negative numbers;unsigned cannot"

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What is the difference between compare() and compareUnsigned() in Java

Others

Example

Pedantic note when printing integer types that might wider than int unsigned insure the final computed result matches the specifier

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Why do I get an integer overflow, and how do I fix it?

On your system unsigned int is apparently larger than uint16_t int is a greater ranked integer type than short in the standard 6.3.1.1 even if they are of the same size

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MISRA warning 12.4: integer conversion resulted in truncation (negation operation)

As for x mod 2 check the performance depends on whether x is of signed or unsigned integer;the code generated for unsigned types is more effective

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Is there a difference between the function Odd(x) and ((x Mod 2) <> 0)

This is obviously completely different from floating-points since integer types cannot represent inf or nan;unsigned integers use modular arithmetic so values wrap-around if the result exceeds the largest integer

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Overflow vs Inf

N easy fix is to change trsq to be unsigned long long;note that your program may report some numbers as prime if some numbers largest prime factor is very close to some numbers square root if the number is the square of a prime because the conversion of number to a floating-point value may round it down so trsq may end up being less than the square root even less than the largest integer that is smaller than the square root

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Pelles C and GCC give different result with this C primality test

What happens when you assign that to bit_flag depends on the type of that variable but if bit_flag is an integer type that is either unsigned or has more than 7 value bits then the assignment is well-defined and value-preserving

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C/C++ Bitwise Operations not resulting in expected output?

Integer tokens in c always have a positive value so in your example 0xfc7f is bigger than 0x7fff and does definitively not fit into an int16_t;the first fit rule for hex constants implies that it has a type that is either unsigned or has more than 16 bit

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Int16_t becomes int32_t F filled

For example if 17179869184u can t be represented by unsigned int then the suffix u may not work if the integer constant has bigger value

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Assign a big number to unsigned int in C

Ince the integer promotions are performed on the arguments of the shift operator the cast to uint16_t is not necessary if int is more than 16 bits wide but if int is exactly 16 bits wide the shift can lead to undefined behaviour because the value need not be representable as an int then so to be safe a cast is needed before the shift;if int is 16 bits wide uint16_t obtained from a cast will then be converted to an unsigned int - unless you have a perverse implementation where the width of unsigned int is smaller than that of int - otherwise to int but that s wide enough then

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TinyOS: How can I convert uint_16 to two uint_8 integers (AES encryption)

In where a and b are unsigned short if unsigned short is narrower than int a and b are each converted to int per the integer promotions c 2018 6.3.1.1 2 and because unsigned short being narrower than int necessarily means int can represent all values of unsigned short

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What is the type of result? Is it possible?

Printf is showing you a -1 since the format of d is a signed integer which is smaller than unsigned usually by 1 bit

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Defining maximum char[] array size allowable to C programs in linux

Assigning -1 to an unsigned integer is a common trick to set it to the largest value it can hold;unsigned is not a qualifier like static extern const or inline

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Does unsigned in C do any internal job?

Integer type;in this case unsigned has a higher rank than int therefore int is promoted to unsigned

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Difference in results when using int and size_t

The problem is that the input integer is larger than what would fit in an unsigned long long

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Find digital roots of a number

Reading input into string and checking for first literal if it is not minus then convert into unsigned integer would be preferable rather than the below method;because half of the part unsigned integers not covered

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Prevent user passing negative numbers to a function accepting unsigned int

As far as the compiler is concerned the conversion from integer 0 to unsigned int is no better than the conversion from integer 0 to pointer

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C++ Scoping and ambiguity in constructor overloads

Unsigned ints don t exist in math only natural numbers;and since most programmers have a mathematical background using an integer is more natural

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Using uint vs int

Edit just a typedef to some kind of integer wouldn t help you much because these are only aliases for types;all your types aliased to unsigned could be used interchangeably

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Is there any way I can make "protected" typedef's in C?

So for integers at least the need for a separate unsigned type is stronger than just giving warnings

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Why doesn't C have unsigned floats?

The internal representation of the integer doesn t really matter;the fact that a signed -1 converts to the maximum value of a similar unsigned integer is interesting but not directly significant

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Backward loop with size_t loop variable

Php does not support unsigned integers and php likely that you have a signed 32bit integer which is -1 for all bits set

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PHP, bitwise operations

If you want the bit pattern without padding bits of a signed integer little endian;print_bits gives different results for negative numbers depending on the representation used it gives the raw bit pattern print_bits_2scomp gives the two s complement representation possibly with a greater width than a signed int has if unsigned int has less padding bits

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How to do a bit representation in a C-standard way?

If an operand is an integer that is narrower than an int the compiler undergoes integral promotion as described above to int or unsigned int

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Longest string in an array of strings in C++

In short if an operand is an integer that is narrower than an int it undergoes integral promotion as described above to int or unsigned int

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Comparing two datatypes in c++?

By the way it would probably be a good idea to use bitwise operations rather than a union to convert the two bytes to a single unsigned int;that way your code would be more portable to other compilers where unsigned is more than two bytes

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Converting signed to unsigned integer in C

Going too high gives the error integer constant is larger than the largest unsigned integer type

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What's the largest array that can exist in Swift?

It might be something like this create table ingredient id integer unsigned not null auto_increment primary key imagepath varchar 63 description text -- other ingredient s non-name dependent properties;create table ingredientname id integer unsigned not null auto_increment primary key ingredientid integer unsigned not null ismain tinyint 1 unsigned not null default 0 name varchar 63 not null key ix_ingredientname_ingredientid_ismain ingredientid ismain unique key ix_ingredientname_ingredientid_name ingredientid name constraint fk_ingredientname_ingredientid foreign key ingredientid references ingredient id on delete cascade on update cascade

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Designing SQL database for an item with multiple names

I do have the guarentee that the signed integer is always bigger or equal than the unsigned integer in bytes so no data should be lost due to lack of space

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Cast unsigned to signed and back

Cpus without flags typically have some simple compare-and-branch instructions often against zero like mips bltz and others that compare two inputs and write a 0 1 result to another integer register mips sltiu -- set on less than immediate unsigned

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Direct Arithmetic Operations on Small-sized Numbers in RISC Architectures

According the books the variations of type integer occupy more or less bytes of memory depending on the architecture however the type unsigned short values â â can get up to 65 535 since the type unsigned long 4 294 967 295

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How occur the allocation of variable of type unsigned short and unsigned long in C programming language?

The integer to unsigned conversion routine to_unsigned can produce a warning if the input integer value is greater than can be expressed in the number of bits specified 6 so the result is clamped to 6 bits with the mod operator

from question  

Write the VHDL text file for a 6-bit adder using INTEGER types

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