
Write a JavaScript code, - for guessing any number between 1 to 20. run the loop till you not get
correct number. Use prompt() box to input number from user.

Hi Friend,
Try the following code:
<SCRIPT LANGUAGE="JavaScript">
var guess;
var rno=Math.round(Math.random()*(19)+1);
while(guess!=rno){
guess=window.prompt("Guess Number from 1 to 20");
if (guess==rno){
alert('Congratulations! You have guess the number!');
}
if (rno<guess){
alert('Number is less than '+ guess);
}
if (rno>guess){
alert('Number is greater than '+ guess);
}
if (guess==''){
alert('Guess a number!');
}
}
</SCRIPT>
Thanks