The cycle of Python basics

1.1 Variable Command

NUMS_OF_GF = 19

NUMSOFALEXGF = 19

No, NAME-OF-ALEX-GF =19.

The middle cannot have a minus sign, a space

Numbers, special characters do not start

Keyword cannot define a variable

Can only start with a letter and an underscore

　

1.2 Input

python3.x input ()

python2.x Raw_input ()

python2.x input () > input what format to output what format

Name = input ("Please input your name")

Print ("Your name is%s"% name)

If the input is a numeric type and you also want to manipulate the numbers, it is best to cast with INI

Raw_input output is a string format that needs to be converted into a numeric type

input_num = Int (raw_inout ("Please input your num:"))

Name =Raw_input ("Name:"). Strip ()##Remove the space between the front and back, do not remove theRoomSpace, but you can also specify what to go for,Just go back and forth.
Age =Raw_input ("Age:")
Job =Raw_input ("Job:")
Print ("Info1 of []:" + name +"\ nname:[] "+ name +"\ nAge:[] "+ Age +"\ nJob:[] "+ job)
Print ("Info2 of%s:\ nname:%s\age:%s\job:%s "% (name,name,age,job))
# # Paragraph
msg = "'
Info3 of%s:
name:%s
age:%s
job:%s
"% (Name,name,age,job)
Print (msg)             

1.3 If ... else

Loop 3 times to guess numbers

While multiple nesting, you can use tag as a variable to judge

Tag = True

While tag:

......

......

Tag =false

Countinue

Luck_num =6
Time =0
num =None
While luck_num! = num:
num =intRaw_input ("Please input your num:"))
 If Luck_num > num:
 print ( "your num is less than ") 
 elif luck_num < num: 
 print (" Your num is more than ") 
 Time + = 1 
  if time >  3: 
 print (" Your guess time more than 3 time ") 
 break 
 Span style= "color: #000080; Font-weight:bold ">else: 
 print (" OK ")             

Luck_num =6
Time =0
num =None
While luck_num! = numand Time <3:
num =intRaw_input ("Please input your num:"))
 If Luck_num > num:
 Print ("Your num is less than")
 Elif Luck_num < num:
 Print ("Your num is more than")
Time + = 1
# If time > 3:
# print ("Your guess time more than 3 time")
# break
Else
if luck_num = = num:
print ("OK")
Else:
print ("Too Much Retrys")

　　　

Luck_num =6
Time =0
num =None
While luck_num! = numand Time <3:
num =intRaw_input ("Please input your num:"))
 If Luck_num > num:
 Print ("Your num is less than")
 Elif Luck_num < num:
 Print ("Your num is more than")
Time + = 1
# If time > 3:
# print ("Your guess time more than 3 time")
# break

if luck_num = = num: # # can be re-judged outside the while
print ("OK")
Else
print ("Too Much Retrys")            

Luck_num =6
Time =0
num =None
While time <3:
num =intRaw_input ("Please input your num:"))
 If Luck_num > num:
 Print ("Your num is less than")
 Elif Luck_num < num:
 Print ("Your num is more than")
Else:
print ("OK")
Break 
Time + = 1
# If time > 3:
# print ("Your guess time more than 3 time")
# break
Else
print ("Too Much Retrys")             

Range (10):
   Print I

0
1
2
3
4
5
6
7
8
9

##ManyLayerFollowRing
For JInchRange5):
 For IInchRange10):
 If i<5:
 Continue# I <5Just jump out of this timeRing
# print (i) # # 5, 6, 7, 8, 9
# If I > 8:
# break
# print (i) # # 5, 6, 7 8
 If j>3:
 Break#Jump out of thisLayerThe loop
 Print (i) # #5,6,,7,8          

The cycle of Python basics