What is the remainder?

When a is divided by b, the remainder is a − b × floor(a/b). E.g. 17 mod 5 = 2.

What if b is negative?

Different languages define mod differently for negatives. This tool uses the same behavior as JavaScript: sign follows dividend.

Remainder when b = 0 is undefined; the tool will show an error.

Calculate the remainder when a is divided by b: a mod b. Same as the remainder in integer division.

a (dividend)

b (divisor)

What is the remainder?: When a is divided by b, the remainder is a − b × floor(a/b). E.g. 17 mod 5 = 2.
What if b is negative?: Different languages define mod differently for negatives. This tool uses the same behavior as JavaScript: sign follows dividend.
What about division by zero?: Remainder when b = 0 is undefined; the tool will show an error.

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