Create a multidimensional grid using just a loop with modulo

Grid with modulo

var rows = 4;
var cols = 5;
var total = rows * cols;
var i = 0;

while(i<total)
{
    var posX = Math.floor(i/rows);
    var posY = i % rows;
                        
    console.log("pos[" + posX + "][" + posY + "]");
                
    i++;
}