Summary  
The while loop repeatedly executes a block of code as long as a Boolean condition remains true, making it suitable for scenarios where the number of iterations depends on dynamic runtime conditions.

General domain of usage  
Mathematical computations

The `while` loop is another kind of loop supported by most programming languages **including JavaScript**.

The `while` loop is mainly used when we want to execute a block of code as long as a condition is `true`. Although it may behave similar to a `for` loop in certain circumstances, it is mainly used in cases where we don't know exactly how many times a block of code needs to be executed.

The general syntax of a `while` loop is:
```
while(boolean_expression) {
  // code to execute
}
```

If the **condition** of a while loop is always true, it will execute forever. Such a loop is known as **an infinite loop**.

Note

The process of a `while` loop can be better understood by looking at it's flowchart:

Following is an example program which utilizes a `while` loop to find the first number that is divisible by both `11` and `12`:

let i = 13;
while(i % 11 != 0 && i % 12 != 0) {
  i += 1;
}

console.log("The first number that is divisible by both 11 and 12 is:", i);

What is the main difference between a `for` loop and a `while` loop?

How many times will the following loop execute?

What will happen if the condition in a `while` loop is always true?

Dive into the world of the most popular language for front-end development – JavaScript. JavaScript is a language built into almost every browser and can be used for a wide variety of tasks. Learn the basic functionality and prepare yourself for the challenges and more advanced programming techniques.

An introduction to JavaScript, covering the basic syntax of the language along with key terms and concepts that form the foundation for learning advanced features. The section includes hands-on tasks designed to help practice these concepts and make the content easy to remember without effort.

The `while` Loop

1. What is the main difference between a `for` loop and a `while` loop?

2. How many times will the following loop execute?

3. What will happen if the condition in a `while` loop is always true?

The `while` Loop

1. What is the main difference between a for loop and a while loop?

2. How many times will the following loop execute?

3. What will happen if the condition in a while loop is always true?

1. What is the main difference between a `for` loop and a `while` loop?

3. What will happen if the condition in a `while` loop is always true?