python3.5 the first chapter of learning

In Python, variable assignments or other statements do not need to be added ";"

In Python, indentation is especially important!

Conditional statement and Loop statement, add ":"

One, variable assignment

Name = "Cecelia"
name2 = Name
Print ("My name is", name,name2)

Second, the use of annotation symbols

1. Use #, #与注释内容之间要有空格

# first Trying

2. Use "' or " "

‘‘‘
For I in Range (0,10,2):
    If i<3:
      Print ("Loop", i)
    Else
        Continue
    Print ("Hhe")
‘‘‘

"' can also be used to assign multiple rows of content to a variable in addition to annotations

Msg= ""
Gf_of_oldboy = "Chen Rong Hua"

Print ("Hello,", Gf_of_oldboy)
‘‘‘
Print (msg)


Third, user input (use of input)

Name = input ("name")
Age = Input ("Age")

2. Ciphertext effect

Import Getpass

Username = input ("Username:")

Password = getpass.getpass ("password")

# to run the results under CMD

3. Connect the value of the input variable in the output

3.1%s or%d
msg = "'---Information of%s---
name:%s
age:%d
job:%s
'% (name, name, int (age), job)

Print (msg)

3.2. Format (), {variable name}

Info2 = "'---information2 of {_name}---
Name:{_name}
Age:{_age}
Job:{job}
". Format (_name=name,
           _age=age,
           Job=job)

Print (Info2)

3.3. Format (), {input Ordinal}

Info3 = "'---Information3 of {0}---
NAME:{0}
Age:{1}
JOB:{2}
". Format (name, age, Job)

Print (INFO3)

Iv.. If ... (Elif ...) else ... Conditional statement (note that theif statement should be added after:)
4.1

If _username = = Username and Password = = _passwd:
    Print ("Welcome user {Name} login ...". Format (Name=username))
Else
    Print ("Invalid username or password")

4.2

if age = = Age_of_oldboy:
    Print ("Yes,you got it.")
Elif Age>age_of_oldboy:
    Print ("Think smaller")
Else
    Print ("Think older")

V. Circular statements
5.1 While loop (plus after statement:)
Count = 0

While Count <3:

age = Int (input ("Guess Age:"))
if age = = Age_of_oldboy:
 Print ("Yes,you got it.")
 Break
Elif Age>age_of_oldboy:
 Print ("Think smaller")
Else
 Print ("Think older")
Count=count+1
Else
 Print ("Tried so many times")

5.2 For Loop (forstatement after:)

For I in Range (0,10,2):
    If i<3:
      Print ("Loop", i)
    Else
        Continue
    Print ("Hhe")

For statement, in range (ARG1,ARG2,ARG3)

Arg1: initial value (including)

ARG2: Final value (not included)

Arg3: Step Size

python3.5 the first chapter of learning