Python List의 요소와 인덱스를 반복문에서 출력 | Print Elements of List with Index in Python For Loop

Case 1

a = ['A', 'B', 'C']  
for i in range(len(a)):
    print(i, a[i])

0 A
1 B
2 C

Case 2

a = ['A', 'B', 'C']
for i, v in enumerate(a):
    print(i, v)

0 A
1 B
2 C

Case 3 (Not Recommended)

a = ['A', 'B', 'C']
for i in a:
    print(a.index(i), i)

0 A
1 B
2 C

Case 4 (Not Recommended)

a = ['A', 'B', 'C', 'A']
for i in a:
    print(a.index(i), i)

0 A
1 B
2 C
0 A