// declaration of a two-dimensional array
// 5 is the number of rows and 4 is the number of columns.
const matrix = new Array(5).fill(0).map(() => new Array(4).fill(0));
console.log(matrix[0][0]); // 0
activities.forEach((activity) => {
activity.forEach((data) => {
console.log(data);
});
});var x = new Array(10);
for (var i = 0; i < x.length; i++) {
x[i] = new Array(3);
}
console.log(x);var [r, c] = [5, 5];
var m = Array(r).fill().map(()=>Array(c).fill(0));
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]);var x = new Array(10);
for (var i = 0; i < x.length; i++) {
x[i] = new Array(3);
}
console.log(x);
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