python基础学习02（if...else...elif）

心已赠人 2022-08-21 10:57 250阅读 0赞

if...else...elif  
格式化打印  
\[root@node1 day1\]\# vi three.py       
"""  
\#!/usr/bin/env python  
name = raw\_input('what is your name?:')  
print 'Hello, %s where are you from?' % name  
\[root@node1 day1\]\# python three.py   
what is your name?:wolf  
Hello, wolf where are you from?  
  
  
格式化输出  
\#!/usr/bin/env python  
name = raw\_input('what is your name?:')  
age = raw\_input('how old are you?:')  
print 'Hello, %s ,you are %s years old, where are you from?' % name  
  
  
\[root@node1 day1\]\# python three.py   
what is your name?:wolf  
how old are you?:22  
Hello, wolf ,you are 22 years old, where are you from?  
  
  
多行全部打印  
\#!/usr/bin/env python  
name = raw\_input('what is your name?:')  
age = raw\_input('how old are you?:')  
age = raw\_input('what is your job?')  
  
  
msg = """  
Information of %s as below:  
    Name : %s  
    Age  : %s  
    Job  : %s  
""" %(name,name,age,job)  
print msg  
  
  
执行  
\[root@node1 day1\]\# python three.py   
what is your name?:wolf  
how old are you?:22  
what is your job?it loser  
  
  
Information of wolf as below:  
    Name : wolf  
    Age  : 22  
    Job  : it loser  
  
  
加判断时  
\#!/usr/bin/env python  
name = raw\_input('what is your name?:')  
\#int将字符串转换为数字  
age = int(raw\_input('how old are you?:'))  
job = raw\_input('what is your job?')  
  
  
msg = """  
Information of %s as below:  
    Name : %s  
    Age  : %s  
    Job  : %s  
""" %(name,name,age,job)  
  
  
\#type查看字符类型  
print type(age)  
if age >=30:  
  print "You are too old, you can only work for ..."  
else:  
\#  pass  
  print 'you are still very young!'  
print msg  
  
  
\[root@node1 day1\]\# python three.py   
what is your name?:wolf  
how old are you?:49  
what is your job?it  
<type 'str'>  
You are too old, you can only work for ...  
  
  
Information of wolf as below:  
    Name : wolf  
    Age  : 49  
    Job  : it  
  
加颜色  
\#!/usr/bin/env python  
name = raw\_input('what is your name?:')  
age = raw\_input('how old are you?:')  
job = raw\_input('what is your job?')  
\#有7中颜色 32是绿色  
msg = """  
Information of %s as below:  
    Name : \\033\[32;1m%s \\033\[0m;  
    Age  : %s  
    Job  : %s  
""" %(name,name,age,job)  
  
  
print type(age)  
  
  
if int(age) >=30:  
  print "You are too old, you can only work for ..."  
else:  
\#  pass  
  print 'you are still very young!'  
print msg  
  
  
"three.py" 23L, 413C written  
\[root@node1 day1\]\# python three.py   
what is your name?:wolf  
how old are you?:22  
what is your job?it  
<type 'str'>  
you are still very young!  
  
  
Information of wolf as below:  
    Name : wolf ;  
    Age  : 22  
    Job  : it  
  
加背景  
\#!/usr/bin/env python  
name = raw\_input('what is your name?:')  
age = raw\_input('how old are you?:')  
job = raw\_input('what is your job?')  
\#42是背景  
msg = """  
Information of %s as below:  
    Name : \\033\[42;1m%s \\033\[0m;  
    Age  : %s  
    Job  : %s  
""" %(name,name,age,job)  
  
  
print type(age)  
  
  
if int(age) >=30:  
  print "You are too old, you can only work for ..."  
else:  
\#  pass  
  print 'you are still very young!'  
print msg  
  
  
"three.py" 23L, 413C written  
\[root@node1 day1\]\# python three.py   
what is your name?:wolf  
how old are you?:22  
what is your job?it  
<type 'str'>  
you are still very young!  
  
  
Information of wolf as below:  
    Name : wolf ;  
    Age  : 22  
    Job  : it  
  
知识扩展：颜色和背景  
  
  
多重判断  
\#!/usr/bin/env python  
name = raw\_input('what is your name?:')  
age = raw\_input('how old are you?:')  
else:  
job = raw\_input('what is your job?')  
  
  
msg = """  
Information of %s as below:  
    Name : \\033\[42;1m%s \\033\[0m;  
    Age  : %s  
    Job  : %s  
""" %(name,name,age,job)  
  
  
print type(age)  
  
  
if int(age) >=50:  
  print "You are too old, you can only work for ..."  
  
  
elif int(age) >=30:  
  print "You are now in the middle age,so enjoy your life before getting too old...."  
    
\#最后一次判断按照逻辑不需要写条件了（逻辑很重要）  
else:  
\#  pass  
  print 'you are still very young!'  
  
  
print msg  
  
  
多重判断  
\#!/usr/bin/env python  
name = raw\_input('what is your name?:')  
age = raw\_input('how old are you?:')  
job = raw\_input('what is your job?')  
  
  
msg = """  
Information of %s as below:  
    Name : \\033\[42;1m%s \\033\[0m;  
    Age  : %s  
    Job  : %s  
""" %(name,name,age,job)  
  
  
print type(age)  
  
  
if int(age) >=50:  
  print "You are too old, you can only work for ..."  
  
  
elif int(age) >=30:  
  print "You are now in the middle age,so enjoy your life before getting too old...."  
  
  
\#elif int(age) >=20:  
\#  print "You are young!!!"  
else:  
\#  pass  
   if int(age) >=20:  
     print 'you are still very young!'  
   else:  
     print 'you are not a adult!'  
print msg