Given two positive integers n and k, print all increasing sequences of length k such that the elements in every sequence are from first n natural numbers.

Input: k = 2, n = 3 Output: 1 2 1 3 2 3

Input: k = 5, n = 5 Output: 1 2 3 4 5

Input: k = 3, n = 5 Output: 1 2 3 1 2 4 1 2 5 1 3 4 1 3 5 1 4 5 2 3 4 2 3 5 2 4 5 3 4 5

[John D'Errico]

But what have you tried? If all you do is post your homework problem, then all you will ever learn is how to get someone else to do your work for you. You do homework problems like this to learn something. It is the act of trying to solve those problems in MATLAB that teaches you how to program in MATLAB. Using those brain cells makes them stronger. So make an effort. When you have a question that is about a problem you have in MATLAB, then ask it. Show that you have done something, and then ask for help.