"Unsigned division of 64-bit division by 32-bit divisor by repeated subtraction of divisor from dividend with remainder may be faster than regular division if the dividend is not expected to be much bigger than the divisor"

"Floating point number division is faster than integer division because of the exponent part in floating point number representation;to divide one exponent by another one plain subtraction is used"

"I am a bit suspicious of the performance because modulo tends to use division which is slower than your subtraction operations"

"This is called a strength reduction optimization because division is stronger slower more expensive than subtraction"

"Again this is not ambiguous once you know what the terms of reference are but beware of incorrectly comparing the first analysis i gave of euclid s algorithm with division o n 2 against this analysis of the algorithm with subtraction o n;n is not the same in each and subtraction is not faster"

"This is called a strength reduction operation because subtraction is a weaker and cheaper operation than division"

"The division operation binds tighter than i.e is evaluated ahead of the subtraction so you are taking a square root of a negative number"

"Doesn t get evaluated the way you are expecting the division operator has higher precedence than the subtraction operator"

"That s because the division operator has a higher precedence than the subtraction operator -"

"Remember multiplication division and remainder operators are all higher precedence than subtraction"

"In this case division has higher precedence than subtraction parenthesis around the division or not"

"Division has higher precedence than subtraction so in the first two examples only the second number is being divided"

"Division has higher precedence than subtraction"

"This is because division operator has higher preference than the subtraction operator - in the first example you use are not using brackets therefore division takes place first you can change your code to"

"Usually simple operations like addition subtraction and multiplication are very fast;division is a bit slower"

"I don t think they have a natural precedence unlike say multiplication and division being of greater precedence than subtraction and addition because they can be built from subtraction and addition"

"In this since division has greater precedence than subtraction therefore x 10 will execute first and here we are dividing two int irrespective of the fact that the variable where final answer is stored is a double so answer will be an int i.e 5 10 0 and then subtraction of an int and double will be done here int will be promoted to a double"

"Without parentheses math.exp c b is executed first as division has higher precedence than subtraction -"

"Because the division operator has higher precedence than subtraction"

If you re on an embedded cpu where division is more expensive you can accomplish exactly the same thing like this the total amount added to accum here is just like the first example but the division is replaced with an incremental repeated subtraction

Similar to sam westrick s definition number of times you can subtract n2 from n1 without going negative you could also do integer division with addition and greater-than using the definition number of times you can add n2 to integer division before integer division is greater than n1 .;addition might seem like a conceptually simpler thing than subtraction

Subtraction is similar using subtraction of the base type and borrow instead of carry multiplication can be done with repeated additions very slow or cross-products faster and division is trickier but can be done by shifting and subtraction of the numbers involved the long division you would have learned as a kid

It may not be the most elegant method but when you just need to convert something ad-hoc thinking of it as comparison and subtraction may be easier than division

This platform is probably not representative of your microcontroller but the test shows that on this platform the subtraction is considerably slower than the division

Division requires iterative subtraction that cannot be performed simultaneously so it takes longer;in fact some fp units speed up division by performing a reciprocal approximation and multiplying by that