Random Number Generator

Question

I'm not to famililar with Math.floor nor Math.random but i do know what they both do. So when I try to enter my first prompt and my second prompt it just comes at as 0

https://code.sololearn.com/WKhsmHXzvVB7/?ref=app

Answer 1

+""
you got it!

Answer 2

convert number to string by concatenating the number to an empty string. it's a pair of double quotes "", but you can also use a pair of single quotes ''.
you can use toString() too, but I'm lazy...
using string templates seems to be faster, though...

https://dev.to/sanchithasr/5-ways-to-convert-number-to-string-3fhd

https://i.stack.imgur.com/mPxVd.png

Answer 3

Swap second and first. Also tell the user what they are entering ie min or max

Answer 4

To generate random numbers within a range use a function that takes two arguments(max, min) and return Math.random(max-min) + min

Answer 5

Your Mom
function convert() {
let min = ~~document.getElementById("num1").value;
let max = ~~document.getElementById("num2").value;
min = Math.ceil(min);
max = Math.floor(max);
document.getElementById("demo").innerHTML = Math.floor(Math.random() * (max - min + 1)) + min + "";
}

converting to number(using ~~) and converting to string(using +"") seems to make the button click more responsive, too.

Answer 6

~~ is a risky shortcut to convert to number. Probably better to use Number(....), but Number returns a Nan for invalid inputs while ~~ converts it to 0.

Javascript will convert values into strings when doing string concatenation, so + '' (an empty string) will convert the number to string.

Might be a good idea to use type="number" for the inputs to prevent invalid string inputs.

https://stackoverflow.com/questions/4055633/what-does-double-tilde-do-in-javascript

Answer 7

True

Answer 8

Sajjad Cheraghi with out the +1 in (max-min) the max is not inclusive. Remember math.random always produces a number less than 1 not one inclusive.

Answer 9

Math.random always returns a number less than 1 you have to make an adjustment to the random

math.floor(math.round() * ((max - min + 1) + min)

Answer 10

So i use math.round? Im pretty sure math.floor rounds it too i think. I looked it up on w3schos

Answer 11

https://code.sololearn.com/WiZP0KD0SHkW/?ref=app

Answer 12

Yes you will still use math.floor as well so you can round the decimal that math.round creates. You will then * by the range you want.

math.floor(math.round() * 100)

Is random 0 to 99.

Answer 13

Okay i chnaged it up a bit but its doibg something weird now
https://code.sololearn.com/WKhsmHXzvVB7/?ref=app

Answer 14

Look at your math.round()

It needs to be:

math.round() * ((max - min + 1) + min)

You have:

math.random() * max, min

Answer 15

Okay now it doin this

https://code.sololearn.com/WKhsmHXzvVB7/?ref=app

Answer 16

Almost you have one ) in the wrong spot. Look at (max - min +1) + min

Answer 17

Okay, it should have worked now but still in the begatives

https://code.sololearn.com/WKhsmHXzvVB7/?ref=app

Answer 18

Let's build it:

math.floor()

math.floor(math.round())

math.floor(math.round() * ())

math.floor(math.round() * (()))

math.floor(math.round() * ((max - min + 1) + min))

Answer 19

Ahhh i see this why i got smooth brain

Answer 20

Awesome have fun see ya around.