How is the remainder used in Java?

In Java, the remainder is a modulo operator used to calculate the remainder of two numbers.

Its syntax format is:

int result = dividend % divisor;

In this case, the dividend is the number being divided, and the divisor is the number doing the dividing. The remainder operator calculates the remainder when the dividend is divided by the divisor, and assigns the result to the variable named result.

For example, let’s say we want to find the remainder when we divide 10 by 3:

int result = 10 % 3;

The result of the calculation is 1, because 10 divided by 3 equals 3 with a remainder of 1.

Another important thing to note is that the remainder operator has the same sign as the dividend. For example, the remainder of -10 divided by 3 is -1.

int result = -10 % 3;

The calculation result is negative one.

When the dividend is 0, the remainder operation is not allowed and will throw an ArithmeticException. Therefore, when using the remainder operator, be sure to ensure that the divisor is not 0.