[Compound Operators]


This is a convenient shorthand to calculate the remainder when one integer is divided by another and assign it back to the variable the calculation was done on.


x %= divisor; // equivalent to the expression x = x % divisor;


x: variable. Allowed data types: int.
divisor: non zero variable or constant. Allowed data types: int.

Example Code

int x = 7;
x %= 5;    // x now contains 2

Notes and Warnings

  1. The compound remainder operator does not work on floats.

  2. If the first operand is negative, the result is negative (or zero). Therefore, the result of x %= 10 will not always be between 0 and 9 if x can be negative.

See also