If-Then-Else not showing

Hello! I am trying to find the if - then- else feature- and it is not showing. I have the free account- do I have to have the Pro to be able to utilize?

If the column has already been created as a basic column, you cannot change it to a computed column.
You would need to delete it and create it again.
If your table is linked to a Google Sheet, then you’ll need to delete it in the Google Sheet and then sync with Glide.