Logical operators

 

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Logical operators apply standard boolean algebra operations to their operands.

Operator	Operator name	Example	Result
!	logical NOT	!a	the logical negation of a
&&	logical AND	a && b	the logical AND of a and b
||	logical OR	a || b	the logical OR of a and b

Short-circuit evaluation

&& and || perform short-circuit evaluation (do not evaluate the second operand if the result is known after evaluating the first).

See Also

Operator precedence

Common operators
assignment	increment decrement	arithmetic	logical	comparison	member access	other
a = b a += b a -= b a *= b a /= b a %= b a &= b a |= b a ^= b a <<= b a >>= b	++a --a a++ a--	+a -a a + b a - b a * b a / b a % b ~a a & b a | b a ^ b a << b a >> b	!a a && b a || b	a == b a != b a < b a > b a <= b a >= b	a[b] *a &a a->b a.b	a(...) a, b (type) a ? : sizeof _Alignof (since C11)