ISNUMBER in WPS on Windows FAQ

Last updated:July 17, 2026

Common questions about ISNUMBER usually focus on formula errors, result checks, syntax guidance, and cross-sheet references, with 4 high-frequency topics covered here.

FAQ

What should I do if ISNUMBER shows an error after I enter it?

  1. Check whether the formula starts with =.
  2. Check whether the parentheses match and whether separators are used correctly.
  3. Use the syntax prompt shown during formula entry to correct the formula.
  4. Make sure the content is entered in an editable cell.

How can I view the argument guidance for ISNUMBER?

  1. Select any editable cell.
  2. Type =ISNUMBER(.
  3. Review the automatic syntax prompt.
  4. Follow the prompt to complete the formula.

Why does the ISNUMBER result not match what I expected?

  1. Check whether the tested content is a number stored as text.
  2. Confirm that the referenced cell actually contains a numeric value.
  3. Check for an incorrect cross-sheet reference or a circular reference.
  4. If needed, press F9 to recalculate and review the result again.

Can ISNUMBER be used with other functions?

  1. Yes. You can start with a combined formula such as =IF(ISNUMBER(A1), ... ).
  2. Use ISNUMBER to test the value type first.
  3. Then set different return values in the outer function.
  4. Press Enter to review the combined result.

Glossary

TermDefinition
ISNUMBERA logical function that checks whether a value is numeric and returns TRUE or FALSE.
ArgumentThe value, cell, or reference entered inside a function’s parentheses.
Cross-sheet referenceA reference to a cell on another worksheet used inside the current formula.
Automatic recalculationFormula results update automatically when related data changes.