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Negative Number Modulo C, Investigate the difference between the C remainder (%) operator and the mathematical modulo operation, especially concerning negative operands, referencing C99 specifications. This is an example C program illustrating the behaviour of C's modulo/remainder operator (%) for negative In this tutorial, we will look at a few examples of modulus on negative numbers in C. This page was created on Fri Aug 08 2014 and last changed on Tue Apr 07 2026. In C programming, the modulus operator (%) can be used with negative numbers, but the result depends on the sign of the dividend (left operand). Learn how the modulus operator works with negative numbers in C language, including sign rules, examples, edge cases, and common mistakes programmers should avoid. Thank you for providing examples. A modulo operation a%b returns the remainder for a/b but for negative numbers it does not do so. -1 % 4 in C/C++ is actually equal to -1, not 3 as we’d expect. How can I find a mod with negative number? [duplicate] Ask Question Asked 9 years, 1 month ago Modified 2 years, 5 months ago Modulus With Negative Numbers in C & C++ What it is correct answer when calculating the modulus of two numbers when one of the numbers is negative? General Idea The % operator in C/C++ is not actually defined as modulo operator. Just what is the modulo of a negative number? I read somewhere that you can calculate the proper modulo Exactly how does the % operator work in Python, particularly when negative numbers are involved? For example, why does -5 % 4 evaluate to 3, rather than, say, -1? Modular Arithmetic: In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers “wrap around” when reaching a certain value, called the modulus. gyb kzi 1d nzzpdr anc3 gryveg jubz vpigt pfv v1m