How to use the NOT function
What is the NOT function?
The NOT function returns the Boolean opposite to the given argument. TRUE returns FALSE and FALSE returns TRUE.
What is a Boolean value?
A Boolean value in Excel is a value that can only be TRUE or FALSE. It represents binary logic and is the result of a logical expression using logical operators or a result of a few Excel functions that I'll discuss below.
Mastering Boolean logic and logical expressions is key to manipulating data and controlling workflow in Excel.
What is binary logic?
Binary logic refers to values having one of two states, TRUE or FALSE. This allows Boolean algebra in Excel using logical operators.
What is a logical expression?
A logical expression is a statement that evaluates to TRUE or FALSE. For example:
=A1<4
These expressions use comparison operators to evaluate a condition and produce a Boolean result.
What are the comparison operators?
= - equal sign
< - less than sign
> - greater than sign
These operators let you build more operators like this:
<> - not equal to
<= - less than or equal to
>= - greater than or equal to
These comparison operators let you create logical expressions like: A2<>5 meaning if the value in cell A2 is not equal to 5, the result is either TRUE or FALSE.
What are the logical operators?
The main logical operators in Excel are:
- AND - Returns TRUE if all conditions are true
- OR - Returns TRUE if any condition is true
- NOT - Negates a logical expression
- XOR - Returns TRUE if only one condition is true
Which functions returns the Boolean value TRUE or FALSE?
| Excel Function and Arguments | Description |
|---|---|
| AND(logical1, logical2, ...) | Returns TRUE if all arguments are TRUE |
| OR(logical1, logical2, ...) | Returns TRUE if any argument is TRUE |
| NOT(logical) | Reverses the logic of its argument |
| XOR(logical1, logical2, ...) | Returns TRUE if an odd number of arguments are TRUE |
| ISEVEN(number) | Returns TRUE if number is even |
| ISFORMULA(value) | Returns TRUE if value is a formula |
| ISLOGICAL(value) | Returns TRUE if value is logical value |
| ISNA(value) | Returns TRUE if value is #N/A error |
| ISNONTEXT(value) | Returns TRUE if value is not text |
| ISNUMBER(value) | Returns TRUE if value is number |
| ISODD(number) | Returns TRUE if number is odd |
| ISREF(value) | Returns TRUE if value is reference |
| ISTEXT(value) | Returns TRUE if value is text |
| ISBLANK(value) | Returns TRUE if value is blank |
| ISERR(value) | Returns TRUE if value is error except #N/A |
| ISERROR(value) | Returns TRUE if value is any error |
NOT function Syntax
NOT(logical)
NOT function Arguments
| logical | Required. A boolean value or it's equivalent. TRUE = 1 and FALSE equals 0. |
NOT function example
Formula in cell C3:
Note, the NOT function returns TRUE for a blank cell, see cell B8 and C8.
'NOT' function examples
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Functions in 'Logical' category
The NOT function function is one of 17 functions in the 'Logical' category.
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