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This last statement demonstrates the C ASSIGNMENT OPERATOR '='.  This operator assigns the value of its rightmost operand to the leftmost operand.  Since '=' is an operator, however, the assignment expression has a value of its own: THE VALUE WHICH WAS ASSIGNED.  Therefore in the following example the value of '(a=6)' is 6, so the value 12 is assigned to the integer variable b:

    int    a;
    int    b;
    b = 2 * (a=6);

In this example the variable 'a' is assigned the value 6 as a "side effect" of the expression '2 * (a=6)'.

-- part contents for background part 7
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