How do you define a range in Python?

In Python, you can define a range using the range() function.

The range() function can take one or more arguments to specify the start, end, and step of a range. It returns an iterable object containing integers within the specified range.

Here are some common ways to define a range using the range() function:

1. end interval

for i in range(5):
    print(i)  # 输出：0, 1, 2, 3, 4

1. Determine the sequence of numbers between the starting and ending values.

for i in range(2, 7):
    print(i)  # 输出：2, 3, 4, 5, 6

1. Specify a starting point, an ending point, and a step size.

for i in range(1, 10, 2):
    print(i)  # 输出：1, 3, 5, 7, 9

It is important to note that the range() function returns an iterable object. To obtain all the integers within a range, you can use the list() function to convert it into a list. For example:

numbers = list(range(1, 6))
print(numbers)  # 输出：[1, 2, 3, 4, 5]

Additionally, you can use the “in” keyword to check if a value is within a specific range. For example:

if 3 in range(1, 5):
    print("3在范围内")

I hope this is helpful for you!