ISNUMBER

The ISNUMBER function in Google Sheets checks whether a given value is a number, returning TRUE or FALSE. It's a simple but essential tool for validating data types before running calculations or applying conditional logic. Dive into our comprehensive guide to master its application.

Parameters

• value: The value you want to test.

Step-by-Step Tutorial

1. Checking if a cell contains a number:

   • Example: If A1 contains 42, then =ISNUMBER(A1) will return TRUE.

2. Checking if a cell contains text:

   • Example: If A1 contains "forty-two", then =ISNUMBER(A1) will return FALSE.

Use Cases and Scenarios

1. Data Validation: Confirm that user-entered data is numeric before performing calculations.
2. Conditional Formatting: Highlight cells that contain non-numeric values by combining with IF.
3. Error Prevention: Avoid formula errors by checking data types before running arithmetic operations.

Related Functions

• ISTEXT: Checks whether a value is text.
• ISBLANK: Checks whether a cell is empty.
• ISERROR: Checks whether a value is an error.

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