# ISNUMBER function

Excel ISNUMBER Function is a simple yet powerful tool that allows you to check whether a cell contains a number or not. It returns a value of TRUE if the cell contains a number and FALSE if it doesn’t, making it a handy function for data validation and analysis.

ISNUMBER(value)

## How to use

You can use the ISNUMBER function in Excel to determine whether a cell contains a number. Here’s how you can use it:

Example 1: Checking if cell A1 contains a number.

This formula will return TRUE if cell A1 contains a number, and FALSE if it contains any other type of data, like text or empty cells.

Example 2 (Optional): Using ISNUMBER with IF function to perform an action based on whether a cell contains a number.

This formula combines ISNUMBER with the IF function to display a custom message depending on whether cell A1 contains a number or not.

Example 3 (Optional): Checking if a cell in another sheet (Sheet2!A1) contains a number.

This example demonstrates that you can use ISNUMBER to check cells in different sheets within your Excel workbook.