for loop shorthand javascript

Chetan Nada answered on January 19, 2022 Popularity 9/10 Helpfulness 5/10

answer for loop shorthand javascript

for loop shorthand javascript

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// for loop shorthand javascript
// Longhand:
const animals = ['Lion', 'Tiger', 'Giraffe'];
for (let i = 0; i < animals.length; i++){
  console.log(animals[i]); 
// output: 
// Lion
// Tiger
// Giraffe
}

// Shorthand:
for (let animal of animals){
    console.log(animal);
// Lion
// Tiger
// Giraffe
}

// If you just wanted to access the index, do:
for (let index in animals){
  console.log(index);
// 0
// 1
// 2
}

// This also works if you want to access keys in a literal object:
const obj = {continent: 'Africa', country: 'Kenya', city: 'Nairobi'}
for (let key in obj)
  console.log(key) 
// continent
// country 
// city
  
// Shorthand for Array.forEach:
function logArrayElements(element, index, array) {
  console.log(index + " = " + element);
}
["first", "second", "third"].forEach(logArrayElements);
// 0 = first
// 1 = second
// 2 = third

Popularity 9/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: for-loop javascript shorthand

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Contributed on Jan 19 2022

Chetan Nada

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