리스트(list)

1. 리스트

# 리스트(list)

numbers = [2, 3, 5, 7, 11, 13]

names = ['윤수', '혜린', '태호', '영훈']

# 인덱싱(indexing)

print(name[1]) # 혜린

print(names[0]) # 윤수

print(names[-1]) # 영훈

print(numbers[-2]) # 11

print(numbers[1] + numbers[3]) # 10

# 변수 저장

num_1 = numbers[1]

num_2 = numbers[3]

print(num_1 + num_2)

>>> 10

# 리스트 슬라이싱(list slicing)

print(numbers[0:4])

>>> [2, 3, 5, 7]

print(numbers[1:])

>>> [3, 5, 7, 11, 13]

print(numbers[:4])

>>> [2, 3, 5, 7]

new_list = numbers[:3]

print(new_list)

>>> [2, 3, 5]

# 리스트 요소 바꾸기

numbers[0] - 7

print(numbers)

>>> [7, 3, 5, 7, 11, 13]

numbers[0] = numbers[0] + numbers[4]

print(numbers)

>>> [13, 3, 5, 7, 11, 13]

3. 리스트 함수

numbers_1 = []

numbers_1.insert(10, 20) # (x + 1번째 자리에, 20을 넣는다)

numbers_1.append(5) # 끝에 5를 추가

numbers_1.append(8) # 끝에 8을 추가

numbers_1.insert(1, 10) (x + 1번째 자리에, 10을 넣는다)

print(numbers_1)

>>> [20, 10, 5, 8]

print(len(numbers_1)

>>> 4

numbers_2 = [2, 3, 5, 7, 11, 13, 17, 19]

del numbers_2[3] # 3 + 1 자리를 지운다

print(numbers_2)

>>> [2, 3, 5, 11, 13, 17, 19]

numbers_3 = [2, 3, 5, 7, 11, 13, 17, 19]

numbers_3.insert(4, 3) # (x + 1번째 자리에, 3을 넣는다)

print(numbers_3)

>>> [2, 3, 5, 7, 3, 11, 13, 17, 19]

4. 리스트 정렬

numbers = [19, 13, 2, 5, 3, 11, 7, 17]

numbers.sort()

print(numbers)

>>> [2, 3, 5, 7, 11, 13, 17, 19]

numbers.sort(reverse = True)

print(numbers)

>>> [19, 17, 13, 11, 7, 5, 3, 2]

numbers = sorted(numbers)

print(numbers)

>>> [2, 3, 5, 7, 11, 13, 17, 19]

numbers = sorted(numbers, reverse = True)

print(numbers)

>>> [19, 17, 13, 11, 7, 5, 3, 2]

5. 리스트 복사

numbers = [19, 13, 2, 5, 3, 11, 7, 17]

numbers_2 = numbers[:]

print(numbers_2)

>>> [19, 13, 2, 5, 3, 11, 7, 17]