ISLOGICAL function in excel is an information function. It is used to find out whether cells contain a logical value or not. It returns TRUE if cell contains a logical value otherwise returns FALSE. It is a worksheet function and can be entered in the cell in which value is required.
- Value: It is the value which will be tested. It can be in form of an empty cell, an error, number, text, logical value etc.
- Values of the arguments in ISLOGICAL function are not converted.
- This function can be used with functions like IF function, testing outcomes, locating errors etc.
In this example, various logical values are entered in column B with some of them left without logical values, and ISLOGICAL function is used to find out which of them contain logical value and which of them do not.