Logical Operators and Values

List of operators and values

Purpose	Operator example
false value	0
true value	non-zero
logical negation	!x
logical and	x && y
logical inclusive or	x || y

• zero is false and non-zero is true

• Warning: a common mistake is
  

        int i, j;
        /* some code setting i and j */
        if ( i = j )
        { /* some stuff */
        }
  

  this sets i = j and then does some stuff if j is non-zero