JavaScript For Each Loop

Perform For Each Loop In JavaScript

Loops execute one or more statements up to a specific number of times.

Loops allow repetitive tasks to be executed using minimal code. For each loop iterates over the elements of an array, collection or iterable without tracking index or size.

Loops allow complex tasks to be simplified by automating similar operations.

Common Syntax Of For Each Loop In JavaScript

Glossary:

Array

Data structure consisting of group of memory elements accessed by at least one index or key.

Collection

Abstract data type grouping such as arrays.

Iterate

Repeat a process.

Iterable

An object that can be iterable over such as an array.

Common For Each Loop Conditions

Ojamboshop.com Learning JavaScript For Each Loop

Name	Description	Example
array.forEach(callbackFunction)	Execute provided function once for each element in array or a set.	numbers.forEach((num) => console.log(num));
Name	Description	Example

JavaScript For Each Loop Snippet

// OjamboShop.com Learning JavaScript For Each Loop Tutorial
let pickup_truck = {"brand":"Ford", "model":"F-Series", "year":1984};
let even_numbers = [2,4,6,8,10];
let numbers = [10, 20, 30, 40, 50];
// Without Loops
console.log(pickup_truck["brand"]);
console.log(pickup_truck.brand);
console.log(pickup_truck.model);
console.log(pickup_truck.year);
console.log(even_numbers[0]);
console.log(even_numbers[1]);
console.log(even_numbers[2]);
console.log(even_numbers[3]);
console.log(even_numbers[4]);
console.log(numbers[0]);
console.log(numbers[1]);
console.log(numbers[2]);
console.log(numbers[3]);
console.log(numbers[4]);
// For Each Loop
Object.entries(pickup_truck).forEach(([key, value]) => console.log(`${key}: ${value}`));
even_numbers.forEach((even_number) => console.log(even_number));
numbers.forEach((number) => console.log(number));

Usage

You can use any IDE or text editor and the web browser to compile and execute JavaScript code. For this tutorial, the OjamboShop.com Learning JavaScript Course Web IDE can used to input and compile JavaScript code for the for each loop.

Open Source

JavaScript follows the ECMAScript standard and is licensed under the W3C Software License by web browser vendors and runtime environment vendors. This allows commercial use, modification, distribution, and allows making derivatives proprietary.

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Conclusion:

JavaScript makes it easy to use the for each loop statements. Use a for each loop to iterate over an iterable object.

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