# 산술연산
a = 21
b = 2
print(a + b)
print(a - b)
print(a * b)
print(a ** b) # a의 b승
print(a / b)    # 몫
print(a // b)
print(a % b)

# 비교연산
a, b = 5, 3
print(a == b)
print(a != b)
print(a > b)
print(a >= b)
print(a is b)
print(a is not b)


#  범위연산
list01 = list(range(100)) # 0~ 99
print(list01)


#[start:end] -> start ~ end -1
#[start: end: step] -> start ~ end -1 까지 step 만큼씩
print(list01[12:50])
print(list01[12: 49: 3])

start01 = 'Hello World!'
print(start01[0])
print(start01[0: 5])
print(start01[6: ])

# -1
print(start01[-1])
print(start01[-1:])
print(start01[: -1])
print(start01[:: -1])

#in, not in
start02 = [1,2,3,4,5,6]
print(3 in start02)
print(6 not in start02)
print(9 not in start02)






