CODEWITHSUNDEEP
matlab
Noor AIH
Noor AIH

Reputation: 25

Matlab programming code

I wrote a program on Matlab that checks how many numbers are divisable by 2 starting from 1 to integer N (that is set by the user)

Here's my code:

num=input('Please enter a number');
count=0;

while (num>=0);

if  mod(num,2)==0;
    count=count+1;
end
  num=num-1;

end

disp(count)

I've tried to run this code but it doesn't output anything. I hope someone can help me figure out what is wrong it Please note that we haven't studied it in school, I just read online and tried to write something on my own.

Upvotes: 1

Views: 151

Answers (2)

JoErNanO
JoErNanO

Reputation: 2488

I see many logical errors in your code. To begin with you are checking if num is divisible by 10, not 2. Also you should decrement num regardless if it passes the if condition, if you want to check the next number. Finally you say you want to check numbers ranging 1 to N but your while loop actually checks numbers 0 to N, due to the >= condition.

From a syntactical point of view: if's and while's (and for's) should not have a trailing semicolon after them.

So maybe something like this could be closer to what you are asking, albeit I still don't know if I fully understand your problem.

% Ask for user input
num = input('Please enter a number');

count = 0;
while (num > 0)
    % Check for divisibility
    if  mod (num, 2) == 0
        count = count + 1;
    end

    % Decrement number
    num = num - 1;
end

% Display the count -- writing the variable name without an ending semicolon ';' causes Matlab to output the variable content
count

Upvotes: 1

Cheery
Cheery

Reputation: 16214

No need in loop, use Matlab the way it was designed for

num = input('Please enter a number ');
count = sum(mod(1 : num, 2) == 0);
disp(count);

Upvotes: 1

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