how to use for loops in javascript code example

Example 1: javascript for loop

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

Example 2: javascript for loop

var nums = [1, 2, 3, 5];
for (var i = 0; i,nums.length; i++){
	console.log(nums[i]);
}

Example 3: for loop javascript

var i;
for (i = 0; i < 10 ; i++) {
  //do something
}

Example 4: how to do a for loop in js

for (let i = 0; i < 10; i++) {
  console.log(i);
}