Help!!! ASCII writing a code that displays the numeric code with its character

sorry for the super weird format

Write a MATLAB program that displays ASCII numeric codes as the corresponding characters

Your program should proceed in a loop. Begin by prompting the user to enter some ASCII codes or -1 to quit. Input the codes and echo the corresponding characters to the command window. We're only interested in the ASCII codes representing the core set of displayable characters. These fall in the range 32 to 126. For any codes outside this range (except -1, which is used to quit), substitute the code for a question mark. Proceed in a loop unit -1 is detected. When that happens, output 'Bye!' and terminate.

[Rik]

Sounds like a reasonable homework question. What have you done so far to solve it?

[Charlotte Reed]

I haven't had a full idea on how to start it. I know the "char" function will be involved, but what gets me is the 32-126 range, and defining how to use char and fprintf! I'm very new to MATLAB