javascript 2d array for loop code example

Example 1: nested array loop in javascript

let chunked = [[1,2,3], [4,5,6], [7,8,9]];

for(let i = 0; i < chunked.length; i++) {
  
   for(let j = 0; j < chunked[i].length; j++) {
     
      console.log(chunked[i][j]);
   }
}

Example 2: javascript two dimensional array

var grid = [];
iMax = 3;
jMax = 2;
count = 0;

    for (let i = 0; i < iMax; i++) {
      grid[i] = [];

      for (let j = 0; j < jMax; j++) {
        grid[i][j] = count;
        count++;
      }
    }

// grid = [
//   [ 0, 1 ]
//   [ 2, 3 ]
//   [ 4, 5 ]
// ];

console.log(grid[0][2]); // 4