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JavaScript JavaScript Basics (Retired) Working With Numbers The Random Challenge Solution

My answer is different, but does it provide the same result?

var firstInput = prompt("Please enter a low number");
var secondInput = prompt("Please enter a high number");

var lowNum = parseInt(firstInput); var highNum = parseInt(secondInput);

var randomNumber = Math.floor(Math.random(lowNum - 1) * highNum) + 1;

document.write("Your random number is " + randomNumber);

1 Answer

Steven Parker
Steven Parker
230,024 Points

The computation of the random number is not quite correct.

Math.random does not take an argument, so the "lownum + 1" will be ignored. This formula will generate a random number from 1 to the value entered for "highNum" no matter what is entered for "lowNum". So the number may be significantly lower than "lowNum".

The formula shown in the video will always generate a number that is no lower than "lowNum", and no higher than "highNum".

Ahhh ok, thanks!