Addition with math.random

**Jagst3r15** · 05-01-2012, 08:16 PM

Title is self explanatory - I cannot figure out how to get this code working. Any help?

HTML Code:

<html>
<head>
<title> Addition </title>
</head>
<script>
	
    var guess = -1; // Set guess to a value outside the range of valid values
	var num1 = parseInt(Math.random()*10); // get a number between 0 and 9 
	var num2 = parseInt(Math.random()*10); // get a number between 0 and 9 
	sum = num1 + num2;
		
    alert("(to help test) The correct answer is " + sum);  // Just to help test
	// Use a while loop
	while (guess != sum)
	{
	
		guess = prompt("Guess a number from 1 to 10", "");
		if (guess == sum)
		{
			alert("Correct!");
			
		}
		else if (guess < sum)
		{
			alert("Guess higher ");
		}
		else
		{
			alert("Guess lower");
		}
	}	
                   
</script>
</body>
</html>

**Logic Ali** · 05-01-2012, 08:59 PM

It works. In what way does it fail for you?

**Jagst3r15** · 05-01-2012, 09:47 PM

i got it

**nap0leon** · 05-02-2012, 02:20 PM

When you pick two numbers between 1 and 10, the user is not then guessing a value between 1 and 10, the sum falls between 2 and 20 (inclusive).

You should throw in some logic that verifies that the user entered a number between 1 and 10. Not critical, but it is odd to see "guess lower" when I enter a letter or special character instead of a number.

**Jagst3r15** · 05-02-2012, 02:43 PM

That's true. I'll update that

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