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Creating a two-dimensional array with given width and height in JavaScript

We are required to write a JavaScript function that creates a multi-dimensional array based on some inputs. It should take in three elements, namely −

  • row − the number of subarrays to be present in the array,
  • col − the number of elements in each subarray
  • val minus; the val of each element in the subarrays

For example, if the three inputs are 2, 3, 10

Then the output should be −

const output = [[10, 10, 10], [10, 10, 10]];

Example

Following is the code −

const row = 2;
const col = 3;
const val = 10;
const constructArray = (row, col, val) => {
   const res = [];
   for(let i = 0; i < row; i++){
      for(let j = 0; j < col; j++){
         if(!res[i]){
            res[i] = [];
         };
         res[i][j] = val;
      };
   };
   return res;
};
console.log(constructArray(row, col, val));

Output

This will produce the following output in console −

[ [ 10, 10, 10 ], [ 10, 10, 10 ] ]