function rand() {
num = Math.floor(Math.random() * 100)
if (num == 0 || num == 1) { //2%
div.text(num + "you win!")
}
count += 1
counter.text('count : ' + count)
}
How can I make 0.5% with Math.random() here?
Since you are using a floor function and wants more accuracy than 1-100 percent, I would use a range of 1000 numbers instead.
This way if the random function would return 0-4 it would mean that it is with a probability of 5/1000 = 0.5%. The random function would return numbers between 0-999 not including 1000.
function rand() {
num = Math.floor(Math.random() * 1000)
if (num < 20) { //2%
div.text(num + "you win!")
}
if (num < 5) { //0.5%
div.text(num + "you win!")
}
count += 1
counter.text('count : ' + count)
}
num = Math.round(Math.random() * 100) / 100