Increment (+) and Decrement (--) Operators
Increments or decrements the value of a variable by one.
//prefix syntax
++variable
--variable
//postfix syntax
variable++
variable--
Arguments
- variable
Any numeric variable.
Remarks
The increment and decrement operators are used as a shortcut to modify the value stored in a variable and access that value. Either operator may be used in a prefix or postfix syntax.
If |
Equivalent Action |
Return value |
|---|---|---|
++variable |
variable += 1 |
value of variable after incrementing |
variable++ |
variable += 1 |
value of variable before incrementing |
--variable |
variable -= 1 |
value of variable after decrementing |
variable-- |
variable -= 1 |
value of variable before decrementing |
Example
The following example illustrates the difference between prefix and postfix syntax for the ++ operator.
// Example of prefix increment operator
var j1 : int = 2;
var k1 : int;
k1 = ++j1; // k1 is 3, the value of j1 after incrementing
// Example of postfix increment operator
var j2 : int = 2;
var k2 : int;
k2 = j2++; // k2 is 2, the value of j2 before incrementing