Format
!A
Returns
1 if A is a false value (zero, an empty string, or null); 0 otherwise.
This operator inverts the truthiness of the value after it.
The number 0, an empty string, or null are all false values. Everything else is true.
!A
1 if A is a false value (zero, an empty string, or null); 0 otherwise.
This operator inverts the truthiness of the value after it.
The number 0, an empty string, or null are all false values. Everything else is true.