while loops api in javascript

In JavaScript, a while loop is a control flow statement that allows you to execute a block of code repeatedly as long as the condition specified in the while loop remains true. The syntax of a while loop in JavaScript is as follows:

index.tsx
while (condition) {
    // code to be executed
}
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The condition can be any expression that evaluates to a boolean value. The code block inside the while loop will keep executing as long as the condition remains true.

Here is an example of using a while loop to print the first five even numbers:

index.tsx
let num = 0;
let count = 0;

while(count < 5) {
    if(num % 2 === 0) {
        console.log(num);
        count++;
    }
    num++;
}
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In this example, we initialize the num variable to 0 and the count variable to 0. The while loop continues to execute as long as the count is less than 5. Inside the while loop, we check if num is even using the modulus operator. If num is even, we print it to the console and increment the count variable. We also increment the num variable by 1 in each iteration of the loop.

Using a while loop is a useful technique when you need to repeatedly execute a block of code based on a condition in your program.