Lua String's Find

--Computes the number of char in a string of strings
--better version
Local function Count_char (string, char)
Local index = 0
Local count = 0
While ture do
i+1)
If not index then break end
Count = Count + 1
End
return count
End

Local function Count_char (string, char)
Local index = 0
Local count = 0
While True does
Index = String.find (string, char)
If not index then break end
Count = Count + 1
index+1, #string)
End
return count
End

--test
Local s = ', Hello,world,apple, '
Print (Count_char (S, ', '))
Print (Count_char (S, ' P '))

Conclusion: 工欲善其事, its prerequisite

Lua String's Find