메서드 선언 호출 방법

def sqrt(a)
  x = a*a
  return x
end

def add1(a,b)
  return a+b
end

def add2(a,b=10)
  return a+b
end

def showName1()
  puts "showName1"
end

def showName2
  puts "showName2"
end

puts sqrt(3)
puts add1(3,5)
puts add2(5)
puts add2(5,3)
showName1
showName2()

def sqrt(a)

x = a*a

return x

end

def add1(a,b)

return a+b

end

def add2(a,b=10)

return a+b

end

def showName1()

puts "showName1"

end

def showName2

puts "showName2"

end

puts sqrt(3)

puts add1(3,5)

puts add2(5)

puts add2(5,3)

showName1

showName2()

블럭인수, 가변길이 인수 전달

def meta(&amp;b)
  b.call()
end

def metb(a, *b)
  print a, "\t", b
end

meta{print "블럭인수"}
metb(2, 3)
metb(3,5,6,3,5,3,65,3)

def meta(&b)

b.call()

end

def metb(a, *b)

print a, "\t", b

end

meta{print "블럭인수"}

metb(2, 3)

metb(3,5,6,3,5,3,65,3)

변수 스코프

num = 1

def showNums()
  num = 10
  puts num
end

showNums()
puts num

$gnum = 10

def showNums2()
  gnum = 10
  print gnum, "  ", $gnum, "\n"
end

showNums2()

alias showNums3 showNums2
showNums3()

alias $gnum2 $gnum
puts $gnum2

num = 1

def showNums()

num = 10

puts num

end

showNums()

puts num

$gnum = 10

def showNums2()

gnum = 10

print gnum, " ", $gnum, "\n"

end

showNums2()

alias showNums3 showNums2

showNums3()

alias $gnum2 $gnum

puts $gnum2

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