Casio fx-29 - how to enter "y"

[tcab]

Yes that seems to work - thanks. What confused me was when I enter a number then hit the x^y key the calculator does something to the number and changes it. E.g. "2 x^y" gives me 0.6931 (confusing!) and when I keep going and hit "4 =" then finally I get the answer 16.

What is 0.6931 supposed to mean? Seems you have to ignore the intermediate number and just press on with the key sequence. Entering different x values followed by x^y give different "intermediate" numbers. Very confusing.