CODEWITHSUNDEEP
javascriptrandom
fabuchao
fabuchao

Reputation: 39

Math.Random in function always the same result

I have this code:

function raffle(){
number = Math.random(100) * 100;} 
raffle();

But everytime I raffle(); the number is the same.

Upvotes: 0

Views: 2639

Answers (3)

Tobias Cudnik
Tobias Cudnik

Reputation: 9640

You can simply add the iteration number to every results, like so:

let runNumber = 0
function raffle(){
    return Math.random() * 100 + runNumber++;
} 
raffle();

You probably run it one after another, which is where the "pseudo" random part kick in.

Upvotes: 0

TW80000
TW80000

Reputation: 1515

Your raffle function never returns a value.

Here's a version which returns the random value.

function raffle() {
    return Math.random() * 100;
}

(The Math.random() function returns a floating-point, pseudo-random number in the range [0, 1) that is, from 0 (inclusive) up to but not including 1 (exclusive), which you can then scale to your desired range.)

Upvotes: 0

Alex Parker
Alex Parker

Reputation: 1583

Math.random() returns an a random number between 0 (inclusive) and 1 (exclusive). The Javascript random function doesn't take any parameters.

If you want a random number x such that 0 ≤ x < 100, then you would do:

function raffle() {
    return Math.random() * 100;
}

Upvotes: 3

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