num2str error in converting an integer

My code is a lot more complicated, so I'll show just a simplification:

a=0;
while a<4
    a=a+1;
    disp(['Number=' num2srt(a)])
end

This error message appears: "Undefined function 'num2srt' for input arguments of type 'double'."

I want to convert the number a to string format to display in every cycle, but I can't see where the problem is, especially because I've used num2str with doubles as inputs before, and it didn't gave any error

Answer 1

[Walter Roberson]

You used the function name num2srt but the real function name is num2str