Assignment Operators

Applies To: Microsoft Dynamics AX 2012 R3, Microsoft Dynamics AX 2012 R2, Microsoft Dynamics AX 2012 Feature Pack, Microsoft Dynamics AX 2012

An assignment changes the contents of a variable or field.

The X++ assignment operators are shown in the following table.

Operator	Description
=	Assigns the expression on the right of the equal sign to the variable on the left.
+=	Assigns the variable on the left the current variable value plus the expression on the right.
++	Increments the variable by one.
-=	Assigns the variable on the left the current variable value minus the expression on the right.
--	Decrements the variable by one.

Note

There is no difference between prefixed and postfixed operators.

Examples

The examples in the following table assume that the initial value of i is 1.

Assignment	Example	Description
=	i = i + 1;	i is assigned the value of i, plus 1. i = 2.
+=	i += 1;	i is assigned the value of i, plus 1. i = 2 (i = i + 1).
++	i++; ++i;	i is incremented by 1, and then by 1 again in the second statement. The final value of i is 3.
-=	i -= 1;	i is assigned the value of i minus 1. i = 0 (i = i - 1).
--	--i; i--;	i is decremented by 1, and then by 1 again in the second statement. The final value of i is -1.