Use ISLOGICAL in 3 topics: enter the function, complete the argument with syntax prompts, and check the result for troubleshooting; choose a topic from the index and follow the steps.

How-to Index

#	Topic	Membership
1	1. Enter the ISLOGICAL function	Free
2	2. Fill in the argument with syntax prompts	Free
3	3. Check the result and fix errors	Free

How-to Guide

1. Enter the ISLOGICAL function

Entry point: Formulas tab → formula bar

Open WPS Sheets and select the cell where you want to enter the formula.
Type = in the formula bar or directly in the cell.
Type ISLOGICAL(.
Get ready to enter the value, cell reference, or expression to test.

Success Criteria

UI state: The current cell or formula bar shows =ISLOGICAL(.
Next actions: You can continue entering the argument and complete the formula.

Tips While Using

Common mistakes: If you forget to type = first, the content may be treated as plain text.
Environment limits: You need to work in an editable sheet.

2. Fill in the argument with syntax prompts

Entry point: function input area in the formula bar

After typing ISLOGICAL(, review the syntax prompt that appears automatically.
Confirm the argument position and format from the prompt.
Enter the argument to test, such as a cell reference, logical value, or another formula result.
Type ) and press Enter.

Success Criteria

UI state: The cell displays a TRUE or FALSE result.
Next actions: You can copy the formula, fill it down, or nest it inside another formula.

Tips While Using

Common mistakes: Unclosed parentheses or incorrect separators can cause a formula error.
Environment limits: The returned result depends on the referenced content, so make sure the reference is valid.

3. Check the result and fix errors

Entry point: result cell and formula bar

Review the returned result after entering the formula.
If an error appears, check whether the parentheses match and whether the argument count is correct.
Check whether the referenced cell contains a logical value or a result that can be evaluated correctly.
If the result does not update, edit the referenced content and confirm again. Recalculate manually if needed.

Success Criteria

UI state: The formula returns TRUE, FALSE, or a corrected result as expected.
Next actions: You can continue adjusting references, nesting formulas, or saving the sheet.

Tips While Using

Common mistakes: Mixing text versions of TRUE or FALSE with actual logical values can affect the result.
Environment limits: Circular references or invalid references can affect the returned result.