I need help displaying the max value in my while loop.

So I have wrote this code for a while loop/string:

str=input('Enter an integer greater than 1:','s');

num=str2double(str);

cnt=0;

while num>1

      cnt=cnt+1;

      if mod(num,2)

          num=num*3+1;

      else

          num=num/2;

      end
  end
  s=cnt

It takes any given integer, multiplies it by 3 then adds 1 if it is odd. It divides the number by 2 when it is even. Also "s" represents the number of steps it takes for the loop to reach the end, which is when it reaches '1'. What I am having trouble with is figuring out how to display the max value reached during the loop.

Example, if the user enters "3" the steps would be 3 → 10 → 5 → 16 → 8 → 4 → 2 → 1.

I need the output to be "The max value is 16."

I have tried different codes for "max" such as 'max(num)' and 'max(cnt)' but I cannot figure out how to display the highest value.

[Stephen23]

"So I have wrote this code..."

Really?! You wrote that code? Interestingly that code looks nothing like the code that you wrote, and exactly like the code that I gave you in my answer to your earlier question:

https://www.mathworks.com/matlabcentral/answers/358010-i-need-help-determining-and-displaying-the-number-of-steps-it-takes-to-complete-this-loop-when-any-i

When you take someone's code you should:

• accept their answer.
• acknowledge that you did not write it.

Copying work and claiming it as your own is called plagiarism.

Answer 1

[Walter Roberson]

str=input('Enter an integer greater than 1:','s');

num=str2double(str);

cnt=0;
maxnum = num;
while num>1

        cnt=cnt+1;

        if mod(num,2)

            num=num*3+1;

        else

            num=num/2;

        end
        if num > maxnum; maxnum = num; end
    end
    s=cnt
    maxnum

[Kevin Smith]

Thanks for your help!

Answer 2

[Image Analyst]

To " display the max value reached during the loop" you need to use fprintf(), assuming "during" means "inside". Here is your code with fprintf just before the bottom of the loop:

str=input('Enter an integer greater than 1:','s');
num=str2double(str);
iterationCount=0;
maxnum = num;
while num>1
  iterationCount=iterationCount+1;
  if mod(num,2)
    num=num*3+1;
  else
    num=num/2;
  end
  if num > maxnum
    maxnum = num;
  end
  fprintf('num = %d.  The max after iteration #%d is %d\n', num, iterationCount, maxnum);
end