How to Use the ISNUMBER Function in WPS on Windows

Use ISNUMBER through 4 how-to topics, all available without membership; choose a topic from the index and follow the steps to enter the formula, test values, and troubleshoot results.

How-to Index

How-to Guide

1. Enter the ISNUMBER function

Entry point: Formula tab → formula bar

1. Open WPS Spreadsheet and select the cell where you want to enter the formula.
2. Type = in the formula bar or directly in the cell.
3. Continue by typing ISNUMBER(.
4. Review the syntax prompt shown on the screen.

Success Criteria

• Interface result: =ISNUMBER( appears in the formula bar.
• Next step available: You can continue entering the argument and finish the formula.

Tips While Using

• Common mistake: If you do not start with =, the content may be treated as plain text.
• Environment note: Make sure you are editing an active spreadsheet cell.

2. Fill in the argument and complete the calculation

Entry point: Select the target cell → formula bar

1. After ISNUMBER(, enter the value, cell, or reference that you want to test.
2. Check the syntax prompt to confirm that the argument format is correct.
3. Type the closing parenthesis ).
4. Press Enter to confirm.

Success Criteria

• Interface result: The cell returns TRUE or FALSE.
• Next step available: You can copy the formula to other cells for more checks.

Tips While Using

• Common mistake: A missing closing parenthesis or incorrect separator can cause a formula error.
• Environment note: Different input values directly affect the returned result.

3. Use ISNUMBER with a cross-sheet reference

Entry point: Target cell → formula bar

1. Select the cell where you want to display the result.
2. Type =ISNUMBER(.
3. Switch to another sheet and select the referenced cell.
4. Add the closing parenthesis and press Enter.

Success Criteria

• Interface result: The current sheet shows TRUE or FALSE for the referenced value.
• Next step available: You can change the reference or nest the formula inside another formula.

Tips While Using

• Common mistake: Referencing the wrong cell can produce an unexpected result.
• Environment note: The referenced sheet must exist and the reference must remain valid.

4. Troubleshoot incorrect or unexpected results

Entry point: Select the result cell → formula bar

1. Check whether the formula starts with =.
2. Check whether the parentheses are balanced.
3. Check whether the argument type and count are correct.
4. Check whether the referenced cell contains a number stored as text or whether there is a circular reference.
5. If needed, press F9 to recalculate.

Success Criteria

• Interface result: The error message disappears or the result returns to normal.
• Next step available: You can continue editing, copying, or nesting the formula.

Tips While Using

• Common mistake: A number entered in quotation marks is treated as text, so the result returns FALSE.
• Environment note: In complex formulas, also review the outer nested functions.