Remainder (%)
The remainder operator (%) returns the remainder left over when one
operand is divided by a second operand. It always takes the sign of the dividend.
Note that while in most languages, ‘%’ is a remainder operator, in some (e.g. Python,
Perl) it is a modulo operator.
For two values of the same sign, the two are equivalent, but
when the dividend and divisor are of different signs, they give different results. To
obtain a modulo in JavaScript, in place of a % n, use
((a % n ) + n ) % n.
Syntax
x % y
Examples
Remainder with positive dividend
12 % 5 // 2
1 % -2 // 1
1 % 2 // 1
2 % 3 // 2
5.5 % 2 // 1.5
Remainder with negative dividend
-12 % 5 // -2
-1 % 2 // -1
-4 % 2 // -0
Remainder with NaN
NaN % 2 // NaN
Remainder with Infinity
Infinity % 2 // NaN
Infinity % 0 // NaN
Infinity % Infinity // NaN
Specifications
| Specification |
|---|
| ECMAScript Language Specification (ECMAScript) # sec-multiplicative-operators |
Browser compatibility
BCD tables only load in the browser