ISLOGICAL

Test if a value is logical

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Purpose 

Test if a value is logical

Return value 

A logical value (TRUE or FALSE)

Syntax 

=ISLOGICAL (value)

Arguments 

  • value - The value to test as logical.

Usage notes 

Use the ISLOGICAL function to check if a value is logical. ISLOGICAL will return TRUE when a value is TRUE or FALSE.

For example, =ISERROR(A1) will return TRUE if A1 contains either TRUE or FALSE.

Note that 1 and 0 (zero) are not evaluated as TRUE and FALSE. However, you can use the AND function to evaluate 1 and 0 and TRUE and FALSE.

Normally, value is supplied as a cell address.

ISLOGICAL is part of a group of functions called the IS functions, which are often used to test the result of formulas for errors.

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