Pattern of Y using a "O" string

March 9, 2023

This is my javascript code for the Y pattern but in the bottom part, it is not in the center what’s wrong with my code? will accept odd numbers

const char = "Y";
const size = 5; //all odd numbers
let output = ""
if (char === 'Y') {
  for (let i = 0; i < size; i++) {
    for (let j = 0; j < size; j++) {
          if (i === j && i < size / 2 || j === size / 2 && i >= size / 2 || i + j === size - 1 && i < size / 2 || (j === 0  && i >= size / 2))
          {
            output += 'O';
          } else {
            output += ' ';
          }
        }
        output += '\n';
      }
    }
    
console.log(output);

I expect to have this output:

O   O
 O O 
  O  
  O    
  O

>Solution :

Changing j === 0 to j === 2 will solve this problem. For work universally, just use j === (size - 1) / 2

const char = "Y";
const size = 5;
let output = ""
if (char === 'Y') {
  for (let i = 0; i < size; i++) {
    for (let j = 0; j < size; j++) {
          if (i === j && i < size / 2 || j === size / 2 && i >= size / 2 || i + j === size - 1 && i < size / 2 || (j === (size - 1) / 2  && i >= size / 2)) 
          {
            output += 'O';
          } else {
            output += ' ';
          }
        }
        output += '\n';
      }
    }
    
console.log(output);