How can I choose between two numbers randomly?

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:bust_in_silhouette: Asked By arthurZ

I want to know how to choose between two numbers (not a range) randomly.
For example, choosing 4 or 130, the result will be only 4 or 130.

Thanks a lot for this help.

2
:bust_in_silhouette: Reply From: rolfpancake

Just one way of implementing this:

var x
var first_value = bool(randi() % 2)
if first_value:
    x = 4
else:
    x = 130

Another:

var x = 4
if randf() < 0.5:
    x = 130

You can put this into a function as well:

func choose_randomly(list_of_entries):
    return list_of_entries[randi() % list_of_entries.size()]

func _ready():
   randomize()
   print(choose_randomly([1,2,3,4]))
1 Like
3
:bust_in_silhouette: Reply From: SingingApple

This is an awesome way to do this:

var nums = [4,130] #list to choose from
return nums[randi() % nums.size()]

Note: This method works with lists as huge as you want. It just returns a random element from the list.

Edit: OMG! So many upvotes! Thank you, guys!

Edit: You should also use the randomize() function in ready to give pure random results. (in a computer sense. Computers simply cannot produce completely random results because it uses algorithms.)

Cleaner and faster than my own answer. :smiley:

rolfpancake | 2018-02-19 15:39

2 Likes
4

How can I make it return more than one value from the list?

5

Probably run the chooser as a function until you have a desired number of unique results.

6

Do it twice. If you want two different values you can have it check if the two values are the same if they are generate another random number.

7

Shuffle the list and just get the first two numbers