changing string in a for loop

I have a script that reads the titles of ID's right now I have the MATLAB set up to read one at a time by typing the ID number as a string.

str = 'ID_01'

I want to add a for loop to change the string to ID_02, ID_03,... to ID_100.

Answer 1

[Cris LaPierre]

for n = 1:100
    str = sprintf("ID_%02d",n);
end

[Walter Roberson]

Or

str = compose('ID_%02d', n)