How do I get a number from a string?

[Blumaimn2 (Beans2)]

Hi other developers,
I’ve been running into this problem where I don’t know how to extract a number out of a string.

Here is my code:

ClickForRebirthButton.Text = "$25"

if Cash.Value >= ClickForRebirthButton.Text then --// line here is broken
	MinusCashEvent:FireServer()
	RebirthEvent:FireServer()
end	

Thank you…!

[VegetationBush (FartedWayTooHard)]

You can use the %d character class to get the number of a string, and a + flag after the character class to get as many of the preceding character class as possible (in this case, the preceding character class is %d):

local str = "$25"
local numberFromString = string.match(str, "%d+")

local number = tonumber(numberFromString) --> "tonumber" converts a numerical string into a number

print(numberFromString) --> "25"
print(number) --> 25

Read more about string patterns here:

Strings | Documentation - Roblox Creator Hub

[4winu (4win)]

Alternatively, if it will only ever have a known amount of characters (the dollar sign in this case) at the start, you could use string.sub rather than string.match. For example:

local str = "$19.43"
local number = tonumber(str:sub(2)) -- convert everything after the first character to a number

print(number) --> 19.43
-- supports decimals