Assignment

Once declared, variables may be assigned the value of an expression using the syntax shown in the code sample below.

variable assign_operator expression;

There are thirteen different assignment operators. The most basic operator, '=', simply assigns the value of the expression to the variable. The other operators modify the variable's value in some other way as shown in the table below.

Operator	Action
=	Set variable to expression
+=	Add expression to variable
-=	Subtract expression from variable
*=	Multiple variable by expression
/=	Divide variable by expression
%=	Set variable to remainder after dividing by expression
&=	Bitwise AND expression into variable
|=	Bitwise OR expression into variable
^=	Bitwise exclusive OR into variable
||=	Set variable to absolute value of expression
+-=	Set variable to sign (-1,+1,0) of expression
>>=	Right shift variable by expression
<<=	Left shift variable by expression

Table 3. Operators

The code sample below shows a few of the different types of operators that you can use in NXC expressions.

x = 2;  // set x to 2
y = 7;  // set y to 7
x += y; // x is 9, y is still 7