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

Posted by Keontarius Clark
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Keontarius Clark
Full Stack JavaScript Techdegree Student 6,753 Points

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
229,732 Points
Steven Parker
Steven Parker
229,732 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".

Keontarius Clark
.a{fill-rule:evenodd;}techdegree
Keontarius Clark
Full Stack JavaScript Techdegree Student 6,753 Points

Ahhh ok, thanks!