Python Foundation 2.4 While Loop

# @Time   

# @File   : While loop. py

Example 1:

1 n = 02 while True:3     print'Hello World'4     if n = = Ten:5break         6      N +=1

Print as follows:

1 Hello World 2 Hello World 3 Hello World 4 Hello World 5 Hello World 6 Hello World 7 Hello World 8 Hello World 9 Hello World Ten Hello World  Hello World

Example 2:

1 n = 02 while True:3     if n==10:4 break         5     print N,'hello'6      N +=1

Print as follows:

1 0 Hello 2 1 Hello  3 2 Hello  4 3 Hello  5 4 Hello  6 5 Hello  7 6 Hello  8 7 Hello  9 8 Hello
    
     10 9 Hello
    

Example 3:

#条件为假的时候, also exits the loop. Exit the loop when you enter a null character

1Rinput ="'2  whileRinput! ='Q':3Rinput = Raw_input ('Please input something,q is quite:')4     Print 'Hello'5     ifRinput = ="':6          Break

Example 4:

#应用逻辑非判断, exit the while loop. While condition is false, exits while loop

1Rinput ="'2  whileRinput! ='Q':3Rinput = Raw_input ('Please input something,q is quite:')4     Print 'Hello'5     if  notRinput:6          Break

Example 5:

# While...else ...: The statement that follows else is printed when the normal end while loop. With For...else ... The same as the loop body

1Rinput ="'2  whileRinput! ='Q':3Rinput = Raw_input ('Please input something,q is quite:')4     Print 'Hello'5     if  notRinput:6          Break7 Else:8     Print 'Hello World'

Example 6:

#while loop nested If loop body, support contine

1Rinput ="'2  whileRinput! ='Q':3Rinput = Raw_input ('Please input something,q is quite:')4     Print 'Hello'5     if  notRinput:6          Break7     elifRinput = ='quite':8         Continue9         Print 'Continue'Ten Else: One     Print 'Hello World'

Python Foundation 2.4 While Loop