Changing a button text based on a variable value

Got a driving me nuts moment.

I am trying to change the text on a button based on the value of a variable on the page.

Pretty simple really but just can’t work out how to do it?

I can change text based on a checkbox or radio button etc… but how do you do the above?

Variable stores numbers 1 to 5. If the number is not != 5 then button is ‘Save’

I know it must be a tertiary condition on the text in the button but no matter what I try just can’t work out what its supposed to be?

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