- A while loop in JavaScript allows you to repeatedly execute a block of code as long as a specified condition remains true. Here's how a while loop is structured in JavaScript:
while (condition) {
// Code to be executed while the condition is true
// This code block can contain one or more statements
}
// Code outside the loop
- Here's how the while loop works in JavaScript:
- The condition is a boolean expression that is evaluated before each iteration of the loop. If the condition is initially true, the code block inside the loop is executed.
- After the code block inside the loop is executed, the condition is re-evaluated. If the condition is still true, the loop's code block is executed again. This process continues until the condition becomes false.
- Once the condition becomes false, the program continues with the next statement after the loop.
let count = 0;
while (count < 5) {
console.log("Count:", count);
count++;
}
- In this example, the loop iterates five times because the condition count < 5 starts as true and becomes false after the fifth iteration (when count becomes 5). The output will be:
Count: 0 Count: 1 Count: 2 Count: 3 Count: 4
- It's important to ensure that the condition in a while loop eventually becomes false to prevent infinite loops. Infinite loops can lead to performance issues or crashes in your program.
- Connect your js file to your HTML file
- Open your code in the browser and open your console
- In the
js
file, complete the list of exercises.