The 1 in the method

hello emmanuel lets see an example

function randomNum() {
  return Math.floor(Math.random) * 5 );
}

// if you run this function you will get always get a number between 0 and 4 but never 5 

in the next example we call the same function but we add + 1 at the end

function randomNum() {
  return Math.floor(Math.random) * 5 ) + 1;
}
// this will always give you a number between 1 and 5

or if you want to get the same result you simply multiply it by 6 instead of 5

function randomNum() {
  return Math.floor(Math.random) * 6 );
}
// this will give you the same result as the second example
// a number between 1 and 5 but never 6

hope this helps

Hi Emanuel. It would be helpful if you could tell more about your code and the your question. If you have the original code, it would be real helpful if you could post that too.

// i made like this

var output = Math.floor(Math.random()*(number2-number))+number;

// but the original is like this var output = Math.floor(Math.random()*(number2-number+1))+number;

// there is that number 1, i would like to know what is he doing?