[python]operation

# 산술연산 
a = 21
b = 2
print(a+b)
print(a-b)
print(a*b)
print(a**b) # a의 b 제곱((a^b)
print(a/b)
print(a//b) # floor division -> 소수점 이하는 버림 
print(a%b) # 나머지 modulo

# 결과값
23
19
42
441
10.5
10
1

# 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)

print(True or False)
print(False and True)
print(not False)
print(not True)

# 결과값
False
True
True
False
False
True
True
False
True
False

# 범위 연산
# [start : end] -> start ~ end-1
# [start : end : step] -> start, start+step, start+step+step, ... , end-1

list01 = list(range(100)) # 0 ~ 99
print(list01)
print(list01[12:48:3])

# 2
print(list01[2])

str01 = 'hello,world!'
print(str01)
print(str01[6:11])
print(str01[0:4]*4)

# reverse
print(str01[ : :-1])

# 멤버연산
list02 = [1,2,3,4,5]
print(3 in list02)
print(6 not in list02)

# 결과값
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]
[12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45]
2
hello,world!
world
hellhellhellhell
!dlrow,olleh
True
True