JScript Decrement (--) and Increment (++) Operators

++ and -- operators are used to increment or decrement a variable by one.

Syntax: JScript Decrement (--) and Increment (++) Operators

result = ++variable

result = --variable

result = variable++

result = variable--

Syntax 2: JScript Decrement (--) and Increment (++) Operators

++variable

--variable

variable++

variable--

Arguments: JScript Decrement (--) and Increment (++) Operators

result

Any variable.

variable

Any variable.

Remarks: JScript Decrement (--) and Increment (++) Operators

The increment and decrement operators are used as a shortcut to modify the value stored in a variable. The value of an expression containing one of these operators depends on whether the operator comes before or after the variable:

var j, k;

k = 2;

j = ++k;

j is assigned the value 3, as the increment occurs before the expression is evaluated. Contrast the following example:

var j, k;

k = 2;

j = k++;

Here, j is assigned the value 2, as the increment occurs after the expression is evaluated.