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How do I make a TextBox only accept numbers?
So I'm making a Light Placing plugin (I know, super original!) and when i click, I want a gui to appear asking you things like "How bright?". But, obviously, is someone typed letters in it, it would obviously error.
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Have the script check if tonumber(string) ~= nil. tonumber will return nil if the string given is not a number at all. M39a9am3R 3210 — 9y
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M39a9am3R is right.
1 | --tonumber will turn a string into a number or return nil if the string is not a number |
2 | tonumber("hello!")--nil |
3 | tonumber("1244")-1244 |
Then to have the TextBox only use numbers, just do something like this.
1 | textbox = script.Parent.TextBox --or something |
2 | textbox.FocusLost:connect(function() |
3 | if tonumber(textbox.Text) then |
4 | --do stuff with textbox.Text being a number |
5 | end |
6 | end) |
And if you wanted the players not be able to type letters, then do this.
01 | textbox = script.Parent.TextBox --or something |
02 | textbox.Changed:connect(function(prop) |
03 | if prop == "Text" then |
04 | if not tonumber(textbox.Text) then |
05 | textbox.Text = textbox.Text:sub(1,#textbox.Text-1) |
06 | --using sub to delete the last thing in the string |
07 | --since this fires every single time they type something, it should delete letters instantly |
08 | end |
09 | end |
10 | end) |