Common datatype in many programming languages for representing a whole number


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

Faster useful value

Quality Example
Division much faster

"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"

from question "Compiler optimization on marking an int unsigned?"


"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"

from question "What VHDL libraries to use for decimal modulus"

More useful

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

from question "Signed as default in C"

Bigger guarentee data

Quality Example

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

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


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

from question "Compatibility of vsnprintf and the macros from inttypes"

Always bigger

"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"

from question "Cast unsigned to signed and back"

Int larger promotions

Quality Example
Constant larger

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

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

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

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

Int apparently larger

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

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

Wider int

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

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

Int no better

"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"

from question "C++ Scoping and ambiguity in constructor overloads"


"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"

from question "Why would uint32_t be preferred rather than uint_fast32_t?"

Rank less

"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"

from question "Integer conversions(narrowing, widening), undefined behaviour"


"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"

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

Smaller int

"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"

from question "How to determine the end of va_arg list?"


Quality Example

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

from question "Find digital roots of a number"

Bigger size

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

from question "Unsigned long long VS unsigned long long int"

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