Beginning Python from Novice to Professional (5)-conditions and loops

Conditions and loops

Conditional execution:

Name = Raw_input (' What's your name? ' If Name.endswith (' Gumby '):p rint ' Hello, Mr.gumby '

What is your name? Gumbyhello, Mr.gumby

Name = Raw_input (' What's your name? ' If Name.endswith (' Gumby '):p rint ' Hello, mr.gumby ' else:print ' Hello, stranger '

Multiple conditions:

num = input (' Enter a number: ') if num > 0:print ' The number is positive ' elif num < 0:print ' The number is negative ' E Lse:print ' The number is zero '

Enter a number:5the number is positive

Enter A number: -1the number is negative

Enter a number:0the number is zero

While loop:

x = 1while X<=100:print xx+=1

For loop:

numbers = [0,1,2,3,4,5,6,7,8,9]for number in Numbers:print number

0123456789

else in the loop:

For n in range (99,81,-1): root = sqrt (n) if root = = Int (root):p rint nbreakelse:                                #只在没有调用break时执行print "didn ' t find it!"

Beginning Python from Novice to Professional (5)-conditions and loops