JavaScript Declarations and Assignments Mathematic operations and assignment
Example
Increment by
var a = 9,
b = 3;
b += a;
b will now be 12
This is functionally the same as
b = b + a;
Decrement by
var a = 9,
b = 3;
b -= a;
b will now be 6
This is functionally the same as
b = b - a;
Multiply by
var a = 5,
b = 3;
b *= a;
b will now be 15
This is functionally the same as
b = b * a;
Divide by
var a = 3,
b = 15;
b /= a;
b will now be 5
This is functionally the same as
b = b / a;
7
Raised to the power of
var a = 3,
b = 15;
b **= a;
b will now be 3375
This is functionally the same as
b = b ** a;
