Logical commands determine whether certain expressions are logically true (returning a 1) or false (returning a 0).
Command | Description |
Returns a logical true if an expression evaluates to non-numeric. | |
Allows you to return a true or false value based on the Boolean And, Or combination of two expressions. | |
Determines whether a specified variable has been assigned a value. | |
Returns the bit-wise And, Or, Xor, and Not of individual bits in an integer value. | |
Compares a string value to a pattern. Evaluates to 1 (true) or 0 (false). | |
Inverts the logical value of an expression. | |
Returns true if an expression evaluates to numeric. |