String

# String 은 immutable

print("I don't know")
print('I don\'t know')
print('say "I don\'t know"')  # say "I don't know"
print(r'C:\name\file')  # C:\name\name

# "-----------------" 이후에 공백 없이 line1 이 출력되게
print("--------------------")
print("""\
line1
line2
line3\
""")
print("--------------------")

print('Hi.' * 3 + 'Mike.')  # Hi.Hi.Hi.Mike.

s = 'aaaaaaaaaaaaaa' \
    'bbbbbbbbbbbbbb'
print(s)  # aaaaaaaaaaaaaabbbbbbbbbbbbbb

word = '012345'
print(word[0])  # 0
print(word[1])  # 1
print(word[-1])  # 5
print(word[0:2])  # 01
print(word[:2])  # 01
print(word[2:])  # 2345
print(word[2:5])  # 234
print(word[2:-2])  # 23
print(word[::-1])  # 543210

len(word)  # 6

# word[0] = 'j'  # TypeError: 'str' object does not support item assignment
print('j' + word[1:])  # j12345

s = 'My name is Mike. Hi Mike'
print(s.startswith('My'))  # True
print(s.find('Mike'))  # 11
print(s.rfind('Mike'))  # 20
print(s.replace('Mike', 'Nancy'))  # My name is Nancy. Hi Nancy

'a is {}'.format('a')  # a is a
'a is {2} {1} {0}'.format(1, 2, 3)  # a is 3 2 1
'My name is {name} {family}'.format(name='JM', family='Kim')

str(3.14)  # '3.14'
int('1')  # 1
str(True)  # 'True'

a = 'a'
print(f'a is {a}')

x, y, z = 1, 2, 3
print(f'a is {x}, {y}, {z}')