Calculates the remainder when one integer is divided by another. It is useful for keeping a variable within a particular range (e.g. the size of an array).
result = dividend % divisor
dividend: the number to be divided
divisor: the number to divide by
the remainder
x = 7 % 5; // x now contains 2x = 9 % 5; // x now contains 4x = 5 % 5; // x now contains 0x = 4 % 5; // x now contains 4
/* update one value in an array each time through a loop */int values[10];int i = 0;void setup() {}void loop(){values[i] = AnalogRead(0);i = (i + 1) % 10; // modulo operator rolls over variable }
The modulo operator does not work on floats.
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