Simple solution?

Hey Miguel Fernando,

You are very close with your answer to this challenge! The problem is that with the code you have there, the random number can never be the maximum value possible in the range of random numbers to generate. The reason being that the highest value that the Math.random() function can return is 0.9999.... So, let's say we want a number in between 50 and 100, inclusive. Let's say we roll Math.random() to be 0.99999.... and do the math here.

Math.floor(0.9999... * (100-50)) + 50 which turns into Math.floor(49.9995) + 50. That then evaluates to "49 + 50" which is 99.

In order to get to that last possible upperLimit, all you have to do is add 1 to your (upperLimit - lowerLimit) statement like so:

var lowerLimit = parseInt(prompt("Enter an integer as a lower limit")); 
var upperLimit = parseInt(prompt("Enter an integer as an upper limit")); 
var randomNumber = Math.floor(Math.random() * (upperLimit - lowerLimit + 1)) + lowerLimit; 
document.write(randomNumber);

This will allow 49 to become 50 for the maximum possible roll and thus allow 100 into the accepted possible outcomes. I hope that makes sense! :)