Introduction to Python functions: functions and usage examples of the range function

Introduction to Python functions: functions and usage examples of the range function

Python is a beautiful, easy-to-read, and easy-to-write object-oriented programming language with rich and powerful features. function library. Among them, the range() function is one of Python's built-in functions. It is often used to generate a series of numbers. The common form is: range(start, stop[, step]).

Function of range function:

The range() function can be used to generate an integer sequence, the general form is range([start,] stop[, step]). It returns a range object that represents a sequence of integers from start (default is 0) to stop-1 (excluding stop), separated by steps (default is 1).

How to call the range function:

The following is how to call the range function:

1. range(stop)
2. range(start, stop [, step])

Among them, the stop parameter must be specified, while the start and step parameters are optional. If start is omitted, it defaults to starting at 0. If step is omitted, the default interval is 1.

Examples of using the range function:

The following shows some examples of using the range function.

1. The range function using one parameter

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

The output is:

0
1
2
3
4

2. The range function using two parameters

for i in range(2, 6):
    print(i)

The output is:

2
3
4
5

3. Use the range function with three parameters

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

The output is:

0
2
4
6
8

4. Change the range The object is converted to a list

list(range(3, 8, 2))

The output is:

[3, 5, 7]

Summary: The

range() function can be used to generate a series of numbers, which is very suitable for use in loops and the index of the sequence. Mastering the use of the range() function can greatly improve the efficiency of writing Python programs and make the code more concise and easier to read.

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