While Loops In Javascript

What is while loop
The while loop in JavaScript is a control flow statement that repeatedly executes a block of code as long as a specified condition is true. It’s useful when you don’t know in advance how many times the loop should run.

Syntax

while (condition) {
  // Code to execute as long as the condition is true
}

Example

let count = 0;
while (count < 5) {
          console.log("Count is: " + count);
  count++; // Increment the count to avoid an infinite loop
  }

Explanation:

The loop starts with count = 0.

It checks the condition count < 5. If true, it executes the code inside the loop.

The count variable is incremented by 1 each time the loop runs.

Once count reaches 5, the condition becomes false, and the loop stop.

What is do-while loop?
The do-while loop in JavaScript is a control flow statement that executes a block of code at least once, and then repeatedly executes the block as long as a specified condition is true. It differs from the while loop because the condition is checked after the code block is executed, ensuring the block runs at least once.

do: Contains the block of code to execute.

while: Contains the condition that determines if the loop will run again.

Syntax

do {
    // Code to execute
} while (condition);

Example

let count = 0;
        do {
            console.log("Count is: " + count);
            count++;
        } while (count < 5);

Explanation:

The do block executes once with count = 0.

After the first execution, the while condition count < 5 is checked.

As long as the condition is true, the loop continues.

Once count reaches 5, the condition becomes false, and the loop stops.

Difference between For, While and do-while Loop

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