How to use python input

The input() function in Python3.x accepts a standard input data and returns it as string type.

In Python2.x, input() is equivalent to eval(raw_input(prompt)), which is used to obtain console input.

#raw_input() treats all input as strings and returns the string type. (Recommended learning: Python Video Tutorial)

And input() has its own characteristics when dealing with pure numeric input. It returns the type of the input number (int, float).

Note: Both functions input() and raw_input() can receive strings, but raw_input() directly reads the input from the console (any type of input can be take over). As for input(), it hopes to be able to read a legal python expression, that is, you must use quotes to enclose it when you enter a string, otherwise it will raise a SyntaxError.

Unless there is a special need for input(), we generally recommend using raw_input() to interact with users.

Note: input() in python3 receives the str type by default.

Function syntax

input([prompt])

Parameter description:

prompt: 提示信息

Python2.x: input() requires python input Expression

>>>a = input("input:")
input:123                  # 输入整数
>>> type(a)
               # 整型
>>> a = input("input:")    
input:"runoob"           # 正确，字符串表达式
>>> type(a)
             # 字符串
>>> a = input("input:")
input:runoob               # 报错，不是表达式
Traceback (most recent call last):
  File "", line 1, in 
  File "", line 1, in 
NameError: name 'runoob' is not defined

For more Python-related technical articles, please visit the Python Tutorial column to learn!

The above is the detailed content of How to use python input. For more information, please follow other related articles on the PHP Chinese website!