Answers for "js how to do loop(1)"

javascript for loop

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

Iterate with JavaScript For Loops

var myArray = [];
for (var i = 1; i <= 5; i++){
    myArray.push(i);
} 
console.log(myArray) // console output [ 1, 2, 3, 4, 5 ]