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Engineering LibreTexts

2.8: Modulus Operator

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  • The modulus operator works on integers and yields the remainder when the first operand is divided by the second. In Python, the modulus operator is a percent sign (%). The syntax is the same as for other operators:

    Code 2.8.1 (Python)
    quotient = 7 // 3
    remainder = 7 % 3

    So 7 divided by 3 is 2 with 1 left over.

    The modulus operator turns out to be surprisingly useful. For example, you can check whether one number is divisible by another: if x % y is zero, then x is divisible by y.

    You can also extract the right-most digit or digits from a number. For example, x % 10 yields the right-most digit of x (in base 10). Similarly, x % 100 yields the last two digits.