Checking is number.

[Martyz]

Hi, i want to make a lotto command for ex.: /roll

And how can I get is entered text in command is numbers or letters?

[Aibo]

amount = tonumber(amount) 
if amount then  
  -- ok 
else 
  -- not ok 
end 

[Martyz]

will try this out, thanks.

[Martyz]

Sorry for double posting.

I've got this error:

[2011-01-01 22:35:27] start: Requested by Console 
[2011-01-01 22:35:27] Starting race_martyz 
[2011-01-01 22:35:27] SCRIPT ERROR: race_martyz\commands.lua:37: 'end' expected (to close 'function' at line  near 'else' 
[2011-01-01 22:35:27] WARNING: Loading script failed: race_martyz\commands.lua:37: 'end' expected (to close 'function' at line  near 'else' 
[2011-01-01 22:35:27] start: Resource 'race_martyz' started 

code:

function lotto_roll(player, amount) 
  if tonumber(amount) then 
    if(amount < 100) then 
      outputChatBox("Minimum roll amount is 100$!", player, 255, 100, 0, false) 
      return 
    end 
    if(amount > 1000) then 
      outputChatBox("Maximum roll amount is 1000$!", player, 255, 100, 0, false) 
      return 
    end 
    if(amount > getPlayerMoney(player)) then 
      outputChatBox("You have less money than you entered!", player, 255, 100, 0, false) 
      return 
    end 
    local rroll = math.random(0, 2) 
    if(rroll == 0) then 
      outputChatBox("You've spinned for " ..amount.. "$ and lost!", 255, 255, 0, false) 
      takePlayerMoney(player, amount) 
    end 
    if(rroll == 0) then 
      outputChatBox("You've spinned for " ..amount.. "$ and lost!", 255, 255, 0, false) 
      takePlayerMoney(player, amount) 
    end 
    if(rroll == 1) then 
      outputChatBox("You've spinned for " ..amount.. "$ and WON!", 255, 255, 0, false) 
      givePlayerMoney(player, amount) 
    end 
  end 
  else 
    outputChatBox("It must be number!", player, 255, 100, 0, false) 
  end 
end 
addCommandHandler("roll", lotto_roll) 

Edited January 1, 2011 by Guest

[Aibo]

i've added indentation to your code, try to find your mistake yourself.

[Martyz]

dude, I am scripting lua 3 days so no idea where is the problem and i can't see any indentation O_o

[Aibo]

line 28: you have extra «end» before «else».

[Martyz]

oh thanks!

[Martyz]

Now, whatever I am writing in /roll, it says "It must be number!"...

[Aibo]

because 2nd argument in (server) command handler function is command name, which is a string.

third (and the rest) are arguments.

function lotto_roll(player, command, amount) 

[Martyz]

now if i write /roll , its okay, it shows "It must be number!", but when i type /roll , just no effect

[Aibo]

maybe you have something missing, for example: a check if rroll is 2.

and read about if/elseif in lua wiki, you dont have to «if then return» every time.

[Martyz]

I know how to use else if from PAWN, just didn't think about it in lua ^^ I will try changing something to elseif and will write what's the result.

EDIT:

Problem were not in elseif, but I fixed it by my own, anyway thank you very much for helping.

[Callum]

amount = tonumber(amount) 
if amount and type(amount) == "number" then 
  -- ok 
else 
  -- not ok 
end 

[Aibo]

amount = tonumber(amount) 
if amount and type(amount) == "number" then 
  -- ok 
else 
  -- not ok 
end 

tonumber() returns either number or nil, so i dont think type(amount) == "number" is necessary. unless i'm wrong ofc :3