Malformed pattern (missing '[')

[cakeycocoa (StarvinMarvin)]

1. What do you want to achieve?
   I’m trying to make sure my string only contains numbers or decimals.

2. What is the issue?
   I keep on getting this error “malformed pattern (missing ‘[’)”.

3. What solutions have you tried so far?
   I have tried looking everywhere on the dev hub and have found people having similar’ish problems but none of their fixes worked for me.

I am terrible with string functions.

     btns.sizeY.Text = btns.sizeY.Text:gsub("%f", '')

Found this string method on the dev forum by the way because string methods are too hard for me.

[C_Sharper (Sharpie)]

They’re tricky haha. This might be what you want, it will replace any normal character from the string:

 btns.sizeY.Text = btns.sizeY.Text:gsub("%a+", '')

I don’t know if other symbols can be present in your strings though.

[cakeycocoa (StarvinMarvin)]

Special characters can still be inputted, but I’ll just keep your version and implement a pcall or something like that which will notify the player when a error occurs.