Am I correct?

[Krizzu]

Code: Select all

local mySecretVariable = "A secret!"
local mySecretVariable2 = "Another secret."

function getTheSecret( firstSecret )
     if ( firstSecret ) then
          return mySecretVariable
     else
          return mySecretVariable2
     end
end

print( getTheSecret() )

What should it print?
I think it would print "Another secret" because argument "firstSecret" is not given when the function is call out.
But in page where i found it it says it would print "A secret!"

[Inny]

You're correct, without any parameters given to the function call, firstSecret is set to nil, which in an if condition lua treats as a logical false.

[coffee]

If you run that instead in Lua, Love or an online compiler you wouldn't have to ask if u correct! And is not secure ask to us. We could always error or lie to you (as in that that webpage did) but a Lua interpreter won't. ;D

[qaisjp]

http://lua.org/demo.html

[tv_user]

I've already made this mistake sometimes, so just to give you a warning:

Unlike many other programming languages (for example C++), Lua doesn't assume 0 to be false. There are only two values that Lua treats as a logical false, namely: false and nil. Every other value (even zero) is assumed to be true.

Happy coding