my 2nd part of the challenge, Please give me some feedback

//Sorry for my English if i write something Wrong

// Presentation --------------
alert ('This is my Random Challenge. Ready???');
alert ('Let\'s do it!!');

//Ask for the lower limit ---------------
var lowerLimit = parseInt(prompt("Give me the lower limit of our range"));

//Ask for the Higher limit ---------------

var higherLimit = parseInt(prompt("Give me the higher limit of our range"));


//Doing some calculations ---------------

// getting a random number between 0 and the 
//diference of both limits, and then adding 
//that random to the lowest limit, we get a 
//random number between or both limits

// diference between both limits
var range = higherLimit - lowerLimit;

//Getting random number in the range
var randomNumber = Math.floor(Math.random() * range);


//printing the lower limit plus the random between our range
document.write(randomNumber + lowerLimit);