How to Use the NOT Function in Excel (Invert Logic Easily)

How to Use the NOT Function in Excel (Invert Logic Easily)

The NOT() function in Excel is used to reverse or negate a logical condition. It’s handy when you want to highlight items that don’t match a criteria.

📘 Syntax:

=NOT(logical)

✅ Example – Flag non-passing students:

=NOT(B2>=40)

This returns TRUE if the score is below 40, meaning the student did not pass.

🔗 Combine with IF Function:

=IF(NOT(B2>=40), "Fail", "Pass")

This displays "Fail" if the score is below 40.

🎯 Use Cases:

• Highlight customers who haven’t responded
• Filter out completed tasks
• Exclude specific conditions from your formula logic

🚀 Pro Tip:

NOT is super powerful in dashboards when used with multiple criteria filters.

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