Page History
...
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. |