const  myNumbersArray = [ 1,2,3,4,5];

​

for(let i = 0; i < myNumbersArray.length; i++) {

    console.log(myNumbersArray[i]);

}

var colors = ["red","blue","green"];

for (var i = 0; i < colors.length; i++) {

    console.log(colors[i]);

}

const scores = [22, 54, 76, 92, 43, 33];

​

for (i in scores) {

    console.log(scores[i]);

}

​

// will return

// 22

// 54

// 76

// 92

// 43

// 33

let exampleArray = [1,2,3,4,5]; // The array to be looped over

​

// Using a for loop

for(let i = 0; i < exampleArray.length; i++) {

    console.log(exampleArray[i]); // 1 2 3 4 5

}

​

var data = [1, 2, 3, 4, 5, 6];

​

// traditional for loop

for(let i=0; i<=data.length; i++) {

  console.log(data[i])  // 1 2 3 4 5 6

}

var array = ['a', 'b', 'c']

array.forEach((value, index) => {

  console.log(index); // Will log each index

  console.log(value); // Will log each value

});

let myArray = [{"child": ["one", "two", "three", "four"]}, 

{"child": ["five", "six", "seven", "eight"]}];

for(let i = 0; i < myArray.length; i++){ 

let childArray = myArray[i].child; 

for(let j = 0; j < childArray.length; j++){ 

console.log(childArray[j]); 

}

}/* Outputs:onetwothreefourfivesixseveneight*/

// Durations are in minutes 

const tasks = [

  {

    'name'     : 'Write for Envato Tuts+',

    'duration' : 120

  },

  {

    'name'     : 'Work out',

    'duration' : 60

  },

  {

    'name'     : 'Procrastinate on Duolingo',

    'duration' : 240

  }

];

​

const task_names = [];

for (let i = 0, max = tasks.length; i < max; i += 1) {

    task_names.push(tasks[i].name);

}

​

console.log(task_names) // [ 'Write for Envato Tuts+', 'Work out', 'Procrastinate on Duolingo' ]

const scores = [22, 54, 76, 92, 43, 33];

​

for (let i = 0; i < scores.length; i++) {

    console.log(scores[i]);

}

​

// will return

// 22

// 54

// 76

// 92

// 43

// 33

var len = arr.length;

while (len--) {

    // blah blah

}

const scores = [22, 54, 76, 92, 43, 33];

​

for (score of scores) {

    console.log(score);

}

​

// will return

// 22

// 54

// 76

// 92

// 43

// 33