This article introduces the basic input and output operations Python3 analyze the input and output Python3 basic syntax, encoding conversion, annotation and Chinese encoding related tips with examples in the form of a friend in need can refer to the
examples herein describes Python3 basic input and output operating. Share to you for your reference, as follows:
数据的输入和输出操作是计算机最基本的操作，本节只研究基本的输入与输出，基本输入是指从键盘上输入数据的操作，基本输出是指屏幕上显示输出结果的操作。
2.1 Basic Input and Output
常用的输入与输出设备有很多，如摄像机、扫描仪、话筒、键盘等都是输入设备，然后经过计算机解码后在显示器或打印机等终端上输出显示。
2.2 to print () function output
---- The basic syntax:
print(输出内容) #其中输出内容可以是数字和字符串
print(10)
print("hello world!")
Shows the results
under ** in Python, by default, a print () statement after the output will automatically wrap, if desired once output a plurality of contents and does not wrap, the content can be output using a comma in the English half-angle separately, as follows
print(10, 20, "hahahaha")
---- ASCⅡ code input can be used, but require () function to convert the ord with {chr () function can be converted into a digital code characters ASCⅡ]
print(chr(97))
print(chr(65))
***** need to locate a particular symbol, the input method can be used to obtain the installation, if the input method is not installed, you can win + r charmap input code values to obtain other unicode
2.3 using input () function Input
- Use input () may receive a user keyboard input.
tip = input("提示文字")
print(tip)
Display
which tip to save input variable results, text within double quotes for prompt what to enter.
*** In Python3.x, whether digital or input characters will be read as a string, if wanted converted to a number, required received string type conversion, with int () function converts
tip = input("请输入一个数字")
num = int(tip)
print(num)
2.4 Notes
---- 2.4.1 Single-line comments
The syntax is as follows:
# 注释内容
---- 2.4.2 multi-line comments: a pair of three quotes or a pair of three double quotes
'''
# 注释内容
tip = input("请输入一个数字")
num = int(tip)
print(num)
'''
"""
tip = input("请输入一个数字")
num = int(tip)
print(num)
"""
---- 2.4.3 Chinese comments (Python3 provide Chinese notation declaration syntax)
If you specify character encoding used type of Chinese encoding, need to add Chinese annotation statement at the beginning of the file, so you can specify the character encoding type of Chinese coded in the program, the code error will not occur.
Syntax:
# coding : 编码
# 或者
# coding = 编码
Specific examples are as follows
# _*_ coding : utf-8 _*_
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