Python If condition judgment, datetime

1. If simple judgment

If condition:

Statement block

Else

Statement block

If 1>2:

Print (' fake ')

Else

Print (' true ')

2. Multiple if elif

If condition 1:

Statement block

Elif Condition 2:

Statement block

Else

Statement block

If a==2:

Print (' a=2 ')

Elif a==3:

Print (' A=3 ')

Else

Print (' a=0 ')

3, and and

score=input (' Please enter your score: ')
Score=int (score) #强制类型转换
if score<=100 and score>=90:
print (' excellent ')
elif score<90 and score>=80:
print (' good ')
elif score<80 and score>=60:
print (' Pass ')
elif score<60 and score>=0:
print (' fail ')
Else:
print (' Please enter the correct number ')

4, or OR

Sex=input (' Please enter your gender: ')
If sex== ' male ' or sex== ' female ':   
Print (' Sex legal ')
Else    
Print (' Sex not legal ')

5. DateTime

Import the DateTime module using import first

　　　Import datetime

Set a user name (used with datetime concatenation)

user= ' xxx '

class that represents the date and time

Today=datetime.datetime.today ()

Convert datetime to String type

TODAY=STR (today)

Welcome XX login, today's date is xxx example:

notation 1: msg= ' welcome ' +user+ ' login ' + ' Today's date is ' +today (The way to stitch strings)

Print (msg)

notation 2: msg= ' Welcome%s login, today's date is%s '% (user,today)

Print (msg)

%s placeholder preceded by several%s after parentheses write several variables
%s represents a string type (others are also available)  %d integers%f decimals retain several decimals, plus%.2f in front of F
Retain two decimal places you can also use round (score,2) to retain decimals after several (rounding 0)
\ nthe line break

Python If condition judgment, datetime