zero3-conditional statements

If statement

VI 2.py

#！ /usr/local/bin/python

Name = Raw_input ("Pls shuru name:")

PWD = raw_input ("Pls shuru pwd:")

If name = = "Hu" and pwd = = "123":

Print ("You is Right")

Else

Print ("pls retype")

: wq!

chmod +x 2.py

./2.py

-----------------

Summary: 3 cases of If statement:

If condition:

code block

Else

code block

2.

If condition:

code block

ELSF conditions:

code block

Else

code block

3. Conditions

True False

1>2 n1>n2 n1==n2

name = = "XXX" and pwd = = "XXX"

Name = = "XXXX" or pwd = = = "XXX"

Name! = "XXXX"

--------------------------------

While doing something or quitting until it's satisfied

While condition:

code block

VI 3.py

#! /usr/local/bin/python

Import time

N1 = True

While N1:

Print ("1")

Time.sleep (1)

N1 = False

Print ("End")

: wq!

chmod +x 3.py

[Email protected] hu]#./3.py
1
End

-------------------------------------

Import time

Kaishi = 1

Flag = True

While flag:

Print (Kaishi)

if Kaishi = = 10

Flag = False
Kaishi = Kaishi + 1

Time.sleep (3)

Print ("End")

-----------

Break jumps out of all loops in the while loop, the code below is not executing

Kaishi = 1

While True:

Print (Kaishi)

if Kaishi = = 10:

Break

Kaishi = Kaishi +1

Continue behind, performing the next loop

Jump out of this loop and continue to the next loop

While True:

Print ("123")

Break

----------

While True:

Print ("123")

Continue

Print ("123456")

Print numbers from 1 to 10 in addition to 7:

#! /usr/local/python

Start=1

While True:

If start ==7:

Start + = 1

Continue

Print (start)

If start = = 10:

Break

Start + = 1

10.py

#! /usr/local/bin/python
sum = 0
Start = 1
While start < 100:
temp = start% 2
if temp = = 1:
sum = sum + start
Else
sum = Sum-start
Start + = 1
Print (sum)
~

--------------

11.py

#! /usr/local/bin/python
I=0
While I < 3:
user_name = raw_input ("pls user_name:")
PWD = Raw_input ("pwd:")
if user_name = = "Hu" and pwd = = "123":
Print ("Yes")
Break
Else
Print ("No")
i + = 1

-------------

Coding:

Python 2.7

Unicode Utf-8 GBK

Middle is Unicode

Python

Direct Utf-8 and GBK direct conversion

zero3-conditional statements