how to repeat prompt with the same variable in javascript

How to Repeat Prompt with the Same Variable in Javascript?

Have you ever encountered a situation where you need to repeatedly prompt the user for input using the same variable in JavaScript? It can be quite frustrating to write the same code again and again. However, there are a few ways you can achieve this without repeating the code.

Using a Loop

One way to repeat a prompt with the same variable is by using a loop. You can use either a for loop or a while loop to achieve this. Here's an example using a while loop:

let userInput;

while (!userInput) {
  userInput = prompt("Enter your input:");
}

console.log(userInput);

In this example, the code will keep prompting the user for input until something is entered. The !userInput condition checks if the variable userInput is falsy. If it is, it means that nothing has been entered yet, and the loop continues. Once something is entered, the condition is no longer true, and the loop ends. The entered value is then logged to the console.

Using Recursion

Another way to achieve the same result is by using recursion. Recursion is a technique where a function calls itself until a condition is met. Here's an example:

function getInput() {
  let input = prompt("Enter your input:");

  if (!input) {
    input = getInput();
  }

  return input;
}

console.log(getInput());

In this example, the getInput() function prompts the user for input and checks if it's falsy. If it is, it calls itself again until something is entered. Once something is entered, the entered value is returned.

Using a Function

You can also create a function that takes care of prompting the user for input and returns the result. Here's an example:

function getUserInput() {
  return prompt("Enter your input:");
}

let userInput = getUserInput();

console.log(userInput);

In this example, the getUserInput() function prompts the user for input and returns the entered value. The value is then assigned to the userInput variable, which can be used later in the code.

These are just a few ways you can repeat a prompt with the same variable in JavaScript. Choose the one that suits your needs best and use it to save yourself some time and effort!