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Tests if a supplied number (or expression) is an even number, and if so, returns TRUE; Otherwise, returns FALSE.
Tests if a supplied value is a number, and if so, returns TRUE; Otherwise, returns FALSE.
Tests if a supplied number (or expression) is an odd number, and if so, returns TRUE; Otherwise, returns FALSE.
Converts a non-number value to a number, a date to a serial number, the logical value TRUE to 1 and all other values to 0