CODE EXAMPLE FOR JAVASCRIPT

2d array javascript

var items =[
     
  [1,        2,       3],//this is row 0
  [4,        5,       6],//this is row 1
  [7,        8,       9] //this is row 2
//cullom 0   cullom 1   cullom2
  
]

console.log(/* variable name */ items[/*row*/ 0][/*cullom*/ 0]);