Assignment Operators:  =, +=, -=, *=, /=, %=, >>=, <<=, &=, ^=, |=

assignment-expression :

conditional-expression
unary-expression assignment-operator assignment-expression

An assignment operation assigns the value of the right-hand operand to the storage location named by the left-hand operand. Therefore, the left-hand operand of an assignment operation must be a modifiable l-value. After the assignment, an assignment expression has the value of the left operand but is not an l-value. The assignment-operator is one of the following:

Example

In the following example, the addition assignment operator (+=) is used to add 3 to nNumber:

// Example of the addition assignment operator
int nNumber=1;

nNumber += 3;    // nNumber now is 4