LUA_4 - ZeroWiki

1. ��

�� 겠��. �� 객��(?)��.

function foo()

print("foo!!")
end

foo()

foo!!

a = foo -- a�� foo�� 겨��.
a() -- 그�� a �� .

foo!!

print(type(a)) -- a�� type�� .

function

�� 간��게 foo�� .

function ��() end �� .

�� 개�� 겨�� 값�� 겠��.

function sum(a,b)

return a+b
end

print ("a+b=",sum(1,2))

a+b= 3

sum�� a,b �� 개 �� a+b �� . �� 개�� , �� 까��?

function sum(...) -- �� 개�� .

local sum = 0
for i = 1, #arg do sum = sum + argi end
return "sum=", sum
end

print ( sum(1,2,3,4,5) )

sum= 5

(...) ��개�� arg�� #arg 개 �� . 그�� for �� sum�� 계�� "sum=" 과 �� 결과�� .

2. ��

�� 기�� 게 �� 겠��. �� (scope)�� 간��게 �� 겠��.

outside = 1
function scope()

local inside = 2 -- inside�� local �� .
print (inside)
end

scope()

print(outside) -- outside �� ...

print(inside) -- inside�� . nil ��

nil

�� 겠��.

function scope1()

local inside = 1
function scope2()
print (inside) -- �� local �� 근 �� .
end
scope2()
end

scope1()

local �� 값�� /��경 �� .

3. ��

�� . �� do ~ end �� local �� 고 function �� (scope)�� . �� local�� 근/��경�� .