for loop js

1var colors=["red","blue","green"];
2for (let i = 0; i < colors.length; i++) { 
3  console.log(colors[i]);
4}

1var i; //defines i
2for (i = 0; i < 5; i++) { //starts loop
3  console.log("The Number Is: " + i); //What ever you want
4}; //ends loop
5//Or:
6console.log("The Number Is: " + 0);
7console.log("The Number Is: " + 1);
8console.log("The Number Is: " + 2);
9console.log("The Number Is: " + 3);
10console.log("The Number Is: " + 4);
11//They do the same thing!
12//Hope I helped!

1for (var i; i < 10; i++) {
2  
3}

1var colors = ["red","blue","green"];
2colors.forEach(function(color) {
3  console.log(color);
4});

1let str = "";
2
3for (let i = 0; i < 9; i++) {
4  str = str + i;
5}
6
7console.log(str);
8// expected output: "012345678"
9

1let arr = [];
2for(let i = 0; i <= 10; i++){
3arr[i] = Math.round(Math.random() * 10);
4}
5•	Result: [3, 1, 1, 2, 3, 9, 5, 6, 6, 8, 5] 
6•	                        Or
7let arr = [];
8for(let i = 0; i <= 10; i++){
9arr[i] = Math.trunc(Math.random() * 10);
10} 
11Result[7, 6, 0, 2, 4, 8, 7, 5, 5, 6, 5]
12