Unary Arithmetic Operators

+

The unary plus operator preceding an expression in parentheses forces the grouping of the enclosed operations. It is used with expressions involving more than one associative or commutative binary operator. The operand must have arithmetic type. The result is the value of the operand. An integral operand undergoes integral promotion. The type of the result is the type of the promoted operand.

–

The arithmetic-negation operator produces the negative (two’s complement) of its operand. The operand must be an integral or floating value. This operator performs the usual arithmetic conversions.

~

The bitwise-complement (or bitwise-NOT) operator produces the bitwise complement of its operand. The operand must be of integral type. This operator performs usual arithmetic conversions; the result has the type of the operand after conversion.

!

The logical-negation (logical-NOT) operator produces the value 0 if its operand is true (nonzero) and the value 1 if its operand is false (0). The result has int type. The operand must be an integral, floating, or pointer value.