If/elseif statement block

I'm having a little trouble with coming up with the block for... I'm asking the use to input the temperature unit, and I only want it to accept the characters C,F,K,R. The program then has to check if each unit is valid, meaning it has to be upper case (the above letters). Can anyone help me with the if/else statement that I would use for this.

Answer 1

[Image Analyst]

I thought you agreed to my answer http://www.mathworks.com/matlabcentral/answers/28780-inputting-units where I said to just do the conversion to upper case yourself and don't worry the user about it. You accepted it as the answer already. Why the change of mind back to a user-unfriendly way of doing it?

[Kevin]

It's a assignment doing for class and asked the prof last night and said they wanted it in the if/else block

[Kevin]

Actually nvm, was able to figure this out myself. Thanks for the help though, am using the upper method that you showed me.

[Image Analyst]

OK, that's the way it should be. Etiquette calls for people to say in advance when a question is a homework assignment.