Answers for "how to iterate over array in javascript"

Javascript

javascript loop through array

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
}

// using for...of
for(let i of data) {
	console.log(i) // 1 2 3 4 5 6
}

// using for...in
for(let i in data) {
  	console.log(i) // Prints indices for array elements
	console.log(data[i]) // 1 2 3 4 5 6
}

// using forEach
data.forEach((i) => {
  console.log(i) // 1 2 3 4 5 6
})
// NOTE ->  forEach method is about 95% slower than the traditional for loop

// using map
data.map((i) => {
  console.log(i) // 1 2 3 4 5 6
})

Posted by: Guest on December-18-2020

javascript iterate array

let array = ['Item 1', 'Item 2', 'Item 3'];

// Here's 4 different ways
for (let index = 0; index < array.length; index++) {
  console.log(array[index]);
}

for (let index in array) {
  console.log(array[index]);
}

for (let value of array) {
  console.log(value); // Will log each value
}

array.forEach((value, index) => {
  console.log(index); // Will log each index
  console.log(value); // Will log each value
});

Posted by: Guest on March-26-2020

javascript iterate array

var txt = "";
var numbers = [45, 4, 9, 16, 25];

numbers.forEach(function(value, index, array) {
  txt = txt + value + "<br>";
});

Posted by: Guest on November-25-2019

how to loop through array of numbers in javascript

let numbers = [1,2,3,4,5];
let numbersLength = numbers.length;
for ( let i = 0; i < numbersLength; i++) {
    console.log (numbers[i]);
}

Posted by: Guest on March-24-2020

how to iterate array in javascript

array = [ 1, 2, 3, 4, 5, 6 ]; 
   //set variable//set the stop count // increment each loop
for (let i = 0; i < array.length ;i++) { 
  
         array[i] //iterate through each index.
   //add the intructions you would like to perform.
    
             // add any method to array[
}

Posted by: Guest on January-17-2020

Iterate Through an Array with a For Loop

var arr = [10, 9, 8, 7, 6];
for (var i = 0; i < arr.length; i++) {
   console.log(arr[i]);
}

Posted by: Guest on December-22-2020

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