I want to make a matlab program to get user between 2 interval and display all armstrong number between 2 number. I saw many online answer only have the program to run 100 to 999 but I want to know how to do it for any numbers

I not interested in the answer below instead I want the program to get armstrong number even below 100 and above 999

clear, clc

% Let i take numbers 100 to 999 for i = 100 : 999

    % We examine every digit in i
    is = num2str(i);

    % i1 is the left-most digit in i
    i1 = str2num(is(1));

    % i2 is the middle digit
    i2 = str2num(is(2));

    % i3 is the right-most digit in i
    i3 = str2num(is(3));

    % We calculate the probable AN
    an = i1^3 + i2^3 + i3^3;

    % We compare to the number itself
    if i == an
        % We display the pair of equal numbers
        disp([i an])
    end
end

The results are:

   153   153
   370   370
   371   371
   407   407

Answer 1

[Star Strider]

Go for it!

This page discusses Armstrong Numbers and gives a simple FORTRAN program that you can easily convert to MATLAB code.

Here’s another discussion of Armstrong numbers.