MATLAB: How to fix the function script

functionhomeworkwhile loop

this is edited my script:
function[s,m]=collatz()
%This function will show the steps and maxvalue of even and odd natural
%numbers. It will show the number of steps needed for the number num to
%reach 1. It will show the maxvalue in the list 
%Even numbers will be divided by 2
%Odd numbers will be multiplied by 3 and add to by one
%Both will run as long as the result is greater than 1
clc
s=0
m=?
while x>1
    if mod(x,2)==0 %shows x(natural number is even)
        x=x/2
    elseif mod(x,2)==1 %shows x(natural number is odd)
        x=x*3+1
    end
end
s=s+1;
m=max(?)?
The script above is what I understood from my professor's comments, but I am still lost the m(maxvalue) and what he is saying about my x value. Sorry if the picture is blurry or sideways.

Best Answer

You need to have the step increment and the max calculation inside your while loop.
m = x;  <-- Use this to initialize up front prior to the while loop
s = s + 1;  <-- Put this inside your while loop
m = max(m,x);  <-- Put this inside your while loop after the "if" block
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