JavaScript While Loop

Revised 4 minutes, 38 seconds read By Edward

While 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. While loop executes a set of statements as long as a condition is true.

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

Common Syntax While Loop In JavaScript

Glossary:

Loop

In computer programming, loops are instructions that repeat until a specified condition is reached.

Iteration

Each run or execution of the loop

Common While Loop Conditions

Ojamboshop.com Learning JavaScript While Loop
Name Description Example
while (condition) execute block of code if condition is true while (counter < 10)
break End execution of current structure break;
continue Skip rest of current loop iteration continue;
Name Description Example

JavaScript While Loop Snippet

// OjamboShop.com Learning JavaScript While Loop Tutorial
let pickup_truck = {"brand":"Ford", "model":"F-Series", "year":1984};
let even_numbers = [2,4,6,8,10];
// 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]);
// While Loop
let counter = 0;
while (counter < Object.entries(pickup_truck).length) {
	let [key, value] = Object.entries(pickup_truck)[counter];
	console.log(`${key}: ${value}`);
	counter++;
}
let n = 0;
while (n < even_numbers.length) {
    console.log(even_numbers[n]);
	 n++;
}

JavaScript While Code
OjamboShop.com Web IDE JavaScript While Code

JavaScript While Result
OjamboShop.com Web IDE Compiler Displaying JavaScript While Result


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 was used to input and compile JavaScript code for the while 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 while loop statements. Use a while loop to iterate over an object as long as the condition is true.

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