A do-while loop in JavaScript

A do-while loop in JavaScript is another type of loop statement that is similar to a while loop, but with one key difference: the block of code inside the loop is executed at least once, regardless of whether the condition is true or false. Here's the basic syntax of a do-while loop:

Not a Medium member? Read this article here

do {
  // code to be executed
} while (condition);

• The code to be executed is the block of code that is executed at least once, and repeatedly executed as long as the condition is true.
• The condition is evaluated after each iteration of the loop. If the condition is true, the loop continues. If the condition is false, the loop terminates.

Here’s an example of a do-while loop that counts from 0 to 4:

let i = 0;
do {
  console.log(i);
  i++;
} while (i < 5);

In this example, the variable i is initialized outside of the loop, and the code inside the loop prints the value of i to the console and increments i by 1 after each iteration. The condition checks if i is less than 5, and the loop will execute 5 times, with i taking on the values of 0, 1, 2, 3, and 4, and each value of i will be printed to the console.

You can also use a do-while loop to iterate over an array: