Assignment operators assign values to JavaScript variables.
| Operator | Example | Same As |
|---|---|---|
| = | x = y | x = y |
| += | x += y | x = x + y |
| -= | x -= y | x = x - y |
| *= | x *= y | x = x * y |
| /= | x /= y | x = x / y |
| %= | x %= y | x = x % y |
| &= | x &= y | x = x & y |
| ^= | x ^= y | x = x ^ y |
Examples
The = assignment operator assigns a value to a variable.
var x = 10;
console.log(x) //10
The += assignment operator adds value of the variable x and value given in the RHS of operator and then assigns the result back to the variable.
var x = 10;
x += 5;
console.log(x) //15
The -= assignment operator subtracts value on RHS of operator from the variable x and then assigns the result back to the variable.
var x = 10;
x -= 5;
console.log(x) //5
The *= assignment operator multiplies value of the variable x and value given in the RHS of operator and then assigns the result back to the variable.
var x = 10;
x *= 5;
console.log(x) //50
The /= assignment operator divides value of the variable x by value given in the RHS of operator and then assigns the quotient back to the variable.
var x = 10;
x /= 5;
console.log(x) //2
The %= assignment operator divides value of the variable x by value given in the RHS of operator and then assigns the remainder back to the variable.
var x = 10;
x %= 5;
console.log(x) //0