formula for all numbers

[RompStar]

is there a formula that I can use in say Conditional formatting, that will check the value of a cell and complain if the values are not numbers ? I wanted to turn that cell red, just not sure what function would check for that or how that works ?

Thanks!

 

[JackDanIce]

Try:

=ISNUMBER(A1)

 

[RompStar]

just making sure, hahaha thanks!