Novice Python first day of study notes-first Ptyhon program and Python variables

One, the Python comment and the first Python program:

1. Single-line Comment

# Author XIAJQ

2, multi-line Comment

‘‘‘

------------Comment Content---------------------------

‘‘‘

3, character encoding (python3.5 later version does not need to be set.) Use UTF8 by default)

-*-Coding:utf8-*-

4. Execute in Python file

#!/usr/bin/python

5. The first Python program

#!/usr/bin/ptyhon

# -*-Coding:utf8-*-

#Author: Xiajinqi

Print ("Hello wolrd")

Two, Python variables:

1, the Python variable must be a letter, underscore, the number composition. And start not a bit number.

Name = "Xiajinqi"

Print ("My name is {name}". Format (name =name))

Print ("My name is", name)

Three, the format of the string output of three ways.

Enter the user's basic information: name, age, job, salary. and format printing.

-------------------------------------Info of Xiajiqni----------------------------------
Name:xiajiqni
age:100
salary:33000
Job:it

1. Method One:

Name = input ("Name:")

Age = Input ("Age")

Salary = input ("salary")

Job = input ("job")

info = ""

--------------------------------------------------------------Info of%s---------------------------------------- -----------

Name:%s

Age:%s

Salary:%s

Job:%s

"% (Name,name,age,salary,job)

Print (info)

2, Mode two

Name = input ("Name:")

Age = Input ("Age:")

Salary = input ("Salary:")

Job = input ("Job:")

info = ""

--------------------------------------------------------------info of {name}------------------------------------ ---------------

Name: {Name}

Age: {Age}

Salary: {Salary}

Job: {Job}

". Format (Name=name,age=age,salary=salary,job=job)

Print (info)

3, Mode three

Name = input ("Name:")

Age = Input ("Age:")

Salary = input ("Salary:")

Job = input ("Job:")

info = ""

--------------------------------------------------------------info of {0}--------------------------------------- ------------

Name: {1}

Age: {2}

Salary: {3}

Job: {4}

". Format (Name,age,salary,job)

Print (info)

4. String concatenation (not recommended)

Print ("Age" + "100")

Novice Python first day of study notes-first Ptyhon program and Python variables