Use caution, could anyone give a deep technical explanation to this challenge?

JavaScript
1

hi guys
1- my question is why we need to reinitialize the raw variable inside the for Loop if it is declared before?

2- and why the row.push(0) push more than one 0 (six zeros before) without using iteration like I or j?

3- because if you want to push two zeros you can do it that way row.push(0) * j

function zeroArray(m, n) {
  // Creates a 2-D array with m rows and n columns of zeroes
  let newArray = [];
  let row = [];
  for (let i = 0; i < m; i++) {
    // Adds the m-th row into newArray
    row = [];
    for (let j = 0; j < n; j++) {
      // Pushes n zeroes into the current row to create the columns
      row.push(0);
      
    }
    // Pushes the current row, which now has n zeroes in it, to the array
    newArray.push(row);
  }
  return newArray;
}

let matrix = zeroArray(3, 2);
console.log(matrix);
2

Right now I have just the time to suggest you this tool, play with the code and see what changes if you change some things, like if you don’t reassing row variable
http://pythontutor.com/javascript.html