Understand the problem

Have a clear idea of what the program or function is supposed to do. To test your understanding, make sure that

you can state the program's purpose in one simple English sentence (say, at most 25 words, preferably 10).
if somebody else had written the program, you could distinguish correct results from incorrect results.

Also think about how you would solve the problem if computers had never been invented.

If you're sitting at the computer, you can write down the statement of purpose in a Scheme comment, e.g.

; Cube function: Find the cube (third power) of a number

Last modified: Thu Jun 1 14:20:55 EDT 2000