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

Posted by ABBAS KHAJAH
ABBAS KHAJAH
1,951 Points

another solution Randomjs

Hello

im just wondering if my solution is also correct i have test and it seems to work just fine , but its different from the video , just wondering if my solution is correct ?

var UserInputMax = prompt('please enter a number max'); UserInputMax = parseInt(UserInputMax);

var UserInputMin = prompt('please enter a number min'); UserInputMin = parseInt(UserInputMin);

var total = Math.floor(Math.random() * (UserInputMax - UserInputMin)) + UserInputMin;

console.log('the user has enter from ' + UserInputMin + ' to ' + UserInputMax + ' and they GOT ' + total);

1 Answer

Steven Parker
Steven Parker
229,708 Points
Steven Parker
Steven Parker
229,708 Points

This is almost the same as the video.

The main difference is logging to the console instead of writing to the document. Otherwise you just have one error:

var total = Math.floor(Math.random() * (UserInputMax - UserInputMin)) + UserInputMin;

To get an inclusive range you need to add one to the multiplier:

var total = Math.floor(Math.random() * (UserInputMax - UserInputMin + 1)) + UserInputMin;
ABBAS KHAJAH
ABBAS KHAJAH
1,951 Points

the UserInputMax - UserInputMin + 1 , would make it only not reaching 0 is that correct ?

Steven Parker
Steven Parker
229,708 Points
Steven Parker
Steven Parker
229,708 Points

We don't know if the user will enter 0 for either number. But whatever 2 numbers are given, if you want the random number to have a chance of reaching the larger one, you must add 1 to the multiplier.