Check whether a cell contains a substring

Question

Is there an in-built function to check if a cell contains a given character/substring?

It would mean you can apply textual functions like Left/R

Answer 1

The following formula determines if the text "CHECK" appears in cell C10. If it does not, the result is blank. If it does, the result is the work "CHECK".

=IF(ISERROR(FIND("CHECK",C10,1)),"","CHECK")