7일차)프로그래밍 핵심 개념 in Python(boolean, type)

1. Boolean(불린)

print(2 > 1) # True

print(2 < 1) # False

print(3 >= 2) # True

print(3 <= 3) # True

print(2 == 2) # True

print(2 != 2) # False

print("Hello" == "Hello") # True

print("Hello" != "Hello") # False

print(2 > 1 and "Hello" == "Hello") # True

print(not not True) # not True : False

print(not not False) # not False : True

print(7 == 7 or (4 < 3 and 12 > 10)) # True

x = 3

print(x > 4 or not (x < 2 or x == 3)) # False

2. Type 함수

int(type(3)) # <class 'int'>

print(type(3.0)) # <class 'float'>

print(type("3")) # <class 'str'>

print(type(True)) # <class 'bool'>

def hello():

    print("Hello world!")

print(type(hello)) # <class 'function'> 자료형

print(type(print))

# <class 'builtin_function_or_method'>

# builtin Python에 기본적으로 내장되어 있는

3. 활용법

number = 3

print("숫자니?!")

if type(number) == int:

    print("맞네!")

else:

    print("아닌데?!")

result = "5"

print("숫자니?!")

if isinstance(result, int):

    print("그렇네")

else:

    print("아니네~")