Introduction to Multidimensional Arrays in JavaScript

creating a Multidimensional array in JavaScript

const k = [[12,23,14,15],["satish","ram","mathew"]]
console.log(k[0][0]);
console.log(k[1][0]);

Output

12
satish

Printing elements in a Multidimensional array in JavaScript

//k.length will print the number of rows 
  //k[0].length will print the number of elements in first row 
  const k = [[12,23,14,15],["satish","ram","mathew","tom"]]
  for(let row=0;row<k.length;row++)
  {
      for(let col=0;col<k[row].length;col++)
      {
          console.log(k[row][col]);
      }
  }

Output

12
23
14
15
satish
ram
mathew
tom

Splice on a Multidimensional array in JavaScript

const regnumber=['12bce001','12bce002','12bce003'];
  const studentname=['Satish','Ram','Mathew'];
  const marks = [30,40,50];
  const k = [regnumber,studentname,marks];
  k.splice(1,1,"A","B","C");
  console.log(k);

Output

[Array(3), 'A', 'B', 'C', Array(3)]

Slice on a Multidimensional array in JavaScript

const regnumber=['12bce001','12bce002','12bce003'];
const studentname=['Satish','Ram','Mathew'];
const marks = [30,40,50];
const k = [regnumber,studentname,marks];
let x = k.slice(1);
console.log(x);

Output

[Array(3), Array(3)]