problems with integration

[resolved]

Thanks Han for all the hard work, sorry for the delay, had finals and the holidays.

Your program was my first program to enter into the Prime. Unfortunately it didn't go well. It took me about an hour, partly due to the difficulty in reading the keys to input your code. Upon finishing, I pressed the soft key "check" and got a syntax error on line 0 "#cas" I needed a rest so pressed ESC to exit programing. Usually, ESC will save what I have entered, at least in Notes it will, but it didn't in programs so I lost everything.

I will have to start all over again, but before I do, I want to understand that I type into the Prime the program just as it is written in the paragraph entitled Code: ????
including "#cas" and "#end" ????