Google Sheets: How to make sure that if the value = X in the adjacent cell, then the CONCAT formula is executed?

Question

Google Sheets

Hello. Please help me write a formula/script that if it sees a certain value in a cell executes the formula, if not, it leaves it empty
Example:
=IF(E2 = "No";=CONCAT(A12;B2;B12))

Answer 1

=IF(E2 = "No";CONCAT(A12;B2;B12);"")
No need to write "=" twice.
To make it empty, just specify empty quotes separated by a semicolon.