#지역변수
a=20
def test():
a=35
return a
print("step:",a)
a=100
print("step2:",a)
print("step3:",test())
step: 20
step2: 100
step3: 35
#예제
a= 20
def test():
global a
print(f'ex3: 결과:{a}')
a=35
return a
print(f"ex1 결과:{a}")
a=100
print(f'ex2 결과:{a}')
print(f'ex4 결과:{test()}')
print(f'ex5 결과:{a}')
a=7777
print(f'ex5 결과{a}')
ex1 결과:20
ex2 결과:100
ex3: 결과:100
ex4 결과:35
ex5 결과:35
ex5 결과7777