How can I write the code below in a loop?

Question

Pedro Alves 2017-2-28

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回答： Harshal Ritwik 2023-6-12

My goal is to write a function that prints a pyramid of integers in a triangle shape given the number of rows as input. I wrote:

function pyramid = pyramid(rows)
  if rows == 1
    fprintf('     1')
  elseif rows == 2
    fprintf('     1 \n    123')
  elseif rows == 3
    fprintf('     1 \n    123 \n   12345')
  elseif rows == 4
    fprintf('     1 \n    123 \n   12345 \n  1234567')
  elseif rows == 5
    fprintf('     1 \n    123 \n   12345 \n  1234567 \n 123456789')
 else
    fprintf('Enter number of rows smaller that 5')
end

This fulfills my goal, if the number of rows is up to 5. However, I'd like to do this in a loop and automatically instead of manually inserting the spaces as I did.

Thank you in advance.

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Answer 1

Harshal Ritwik 2023-6-12

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Hi,

As per my understanding of your question you want to convert the switch case statement into a loop statement so that you don’t need to enter the spaces manually and is done automatically. The following Code Snippet may help.

%Code Section: -
function pyramid = pyramid(rows)
    for i = 1:rows              %number of rows
        st="";
         for j= 1:rows-I        %number of spaces in each row
             st=st.append(" ");
         end
         for k= 1:2*i-1
             st = st+k;          %numbers to be entered
         end
         disp(st);
    end
end