【Python入門】Pythonのrange関数とは？使い方と活用方法を徹底解説（Python 3.11）

range(stop)  # 0 から stop - 1 までの整数を生成
range(start, stop)  # start から stop - 1 までの整数を生成
range(start, stop, step)  # start から stop - 1 まで step 間隔で整数を生成

for i in range(5):
    print(i)

for i in range(1, 6):
    print(i)

1
2
3
4
5

for i in range(0, 10, 2):
    print(i)

0
2
4
6
8

for i in range(10, 0, -1):
    print(i)

10
9
8
7
6
5
4
3
2
1

fruits = ["apple", "banana", "cherry"]
for i in range(len(fruits)):
    print(f"{i}: {fruits[i]}")

0: apple
1: banana
2: cherry

squares = [x**2 for x in range(1, 6)]
print(squares)

[1, 4, 9, 16, 25]

names = ["Alice", "Bob", "Charlie"]
ages = [25, 30, 35]
for i in range(len(names)):
    print(f"{names[i]} is {ages[i]} years old.")

Alice is 25 years old.
Bob is 30 years old.
Charlie is 35 years old.