ISNUMBER in WPS on Windows FAQ

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

Check whether the formula starts with = . Check whether the parentheses are paired correctly. Confirm that the argument count and input type match what you intend to test. Re-enter the formula by following the syntax prompt shown during editing.

Q: How can I view the function guidance for ISNUMBER?

Select any editable cell. Type =ISNUMBER( . View the syntax prompt that appears automatically. Use the prompt to confirm the argument format and input method.

When using ISNUMBER, the most common questions focus on formula errors, function guidance, and unexpected results; this section covers 3 frequent questions.

FAQ

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

Check whether the formula starts with =.
Check whether the parentheses are paired correctly.
Confirm that the argument count and input type match what you intend to test.
Re-enter the formula by following the syntax prompt shown during editing.

How can I view the function guidance for ISNUMBER?

Select any editable cell.
Type =ISNUMBER(.
View the syntax prompt that appears automatically.
Use the prompt to confirm the argument format and input method.

Why does the ISNUMBER result not match what I expected?

Check whether the referenced cell contains a number stored as text.
Confirm that the referenced cell or expression in the formula is correct.
If the formula is nested, review each part step by step.
Change the source data again and see whether recalculation updates the result.

Glossary

Term	Definition
ISNUMBER	A function that checks whether a value is numeric and returns TRUE or FALSE.
Syntax prompt	The on-screen parameter guidance shown while entering a function to help complete the formula correctly.
Nested formula	A formula structure that places one function or expression inside another for multi-step logic or calculation.