How do I complete this script for below question? I have partially created the script: see it below the question.

Write a script that asks for a series of numbers and calculates the sum and the mean. When the user enters a value of 0, the script stops and performs the calculation. For example:

Enter a number (type 0 to end) : 5
Enter a number (type 0 to end) : 6
Enter a number (type 0 to end) : 7
Enter a number (type 0 to end) : 8
Enter a number (type 0 to end) : 0
4 numbers entered. Sum=26. Mean=6.5. 

% initialisation 
num==0;
while num==0
      num=input('Enter a number (type 0 to end): ');
end %end while loop

[NoDrivel]

on the script above there is a line space after every semi-colon

[Image Analyst]

I'll fix the formatting for you this time, but please read this for next time: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

Answer 1

[Image Analyst]

Have an accumulator variable (not named sum, which is a built in function name):

% initialisation 
num==0;
theSum = 0;
loopCounter = 0;
while num==0
      num=input('Enter a number (type 0 to end): ');
      if num == 0
          break;
      end
      theSum = theSum + num;
      loopCounter = loopCounter + 1;
end %end while loop
if loopCounter >= 1
    fprintf('%d numbers entered. Sum=%f. Mean=%.1f\n',...
      loopCounter, theSum, theSum/loopCounter);
else
    fprintf('0 numbers entered.\n');
end

[Thorsten]

First line should read

 num = 1;

and while condition should read

while num ~= 0

And you could rewrite the code without a break, if you like, since the while loop breaks if its condition is false.

[Image Analyst]

Correct (I didn't notice the errors he had in his existing code).

Without the break line, you'd have to subtract 1 from the loop counter after the loop exits.