ISLOGICAL

 The ISLOGICAL function in Excel is used to determine if a cell contains a logical value (TRUE or FALSE). It returns TRUE if the cell contains a logical value and FALSE otherwise. Below are 10 examples that demonstrate the use of the ISLOGICAL function, including data and formulas.

Example 1: Basic Usage

Data:

• A1: TRUE

Formula:

• B1: =ISLOGICAL(A1)

Result:

• B1: TRUE

Example 2: Non-Logical Value

Data:

• A2: 123

Formula:

• B2: =ISLOGICAL(A2)

Result:

• B2: FALSE

Example 3: Text Value

Data:

• A3: "Hello"

Formula:

• B3: =ISLOGICAL(A3)

Result:

• B3: FALSE

Example 4: Logical Value from Formula

Data:

• A4: =1=1

Formula:

• B4: =ISLOGICAL(A4)

Result:

• B4: TRUE (because 1=1 evaluates to TRUE)

Example 5: Non-Logical Value from Formula

Data:

• A5: =1+1

Formula:

• B5: =ISLOGICAL(A5)

Result:

• B5: FALSE (because 1+1 evaluates to 2, which is not a logical value)

Example 6: Logical Value in Array

Data:

• A6: {TRUE, FALSE, TRUE}

Formula:

• B6: =ISLOGICAL(A6)

Result:

• B6: TRUE (because the array contains logical values)

Example 7: Mixed Values in Array

Data:

• A7: {TRUE, 123, "Hello"}

Formula:

• B7: =ISLOGICAL(A7)

Result:

• B7: FALSE (because the array contains non-logical values)

Example 8: Logical Value in Conditional Formatting

Data:

• A8: =IF(A1=TRUE, "Yes", "No")

Formula:

• B8: =ISLOGICAL(A8)

Result:

• B8: FALSE (because the result of the IF function is a text value, not a logical value)

Example 9: Logical Value in Nested Formula

Data:

• A9: =AND(TRUE, FALSE)

Formula:

• B9: =ISLOGICAL(A9)

Result:

• B9: TRUE (because the AND function returns a logical value)

Example 10: Logical Value in Error Handling

Data:

• A10: =IFERROR(1/0, FALSE)

Formula:

• B10: =ISLOGICAL(A10)

Result:

• B10: TRUE (because the IFERROR function returns FALSE, which is a logical value)

Summary

The ISLOGICAL function is useful for checking whether a cell contains a logical value (TRUE or FALSE). It can be applied to direct cell references, formulas, and even arrays. The function returns TRUE if the referenced cell or formula result is a logical value, and FALSE otherwise.

These examples should give you a comprehensive understanding of how to use the ISLOGICAL function in various scenarios.