Prompting User to Try Again!

Question

I’m a beginner.
I’m desperate to know how this is done,

- I can prompt a user to type something,

- But I don’t know how to prompt user when they don’t meet my requirement, Like I want the input to be a Number or a String Of Words; So in case of a number not written the result is NaN.

- Now I want to know rather than NaN, how to alert the user to type the correct requirement and Type a code where it’s an infinite loop until they type the correct number or string?

Hope Someone Helps!
Thanks 🙏

Answer 1

Modification to @areila's code -

var number;
while(isNaN(number)){
number = prompt("No.")
}

Answer 2

var number;
while(number.isNan()){
number = prompt(“Please input a number:”)
}

Answer 3

@Ariela, That’s all I must type to prompt user and say type again if they entered the wrong value? Coz that’s not working that’s y asked!
Btw thanks for seeing my question and answering it! 😊😊🙌🏻

Answer 4

@Nikhil, Thanks bro! It’s working now 😁😁👌🏻👍🏻