Three conditional judgments and loops of Python Foundation

IF......ELSE Basic structure:

If condition: Do something Else Do something

Or

If condition: Do something elif condition: Do something Else Do something

Python is indented to determine the scope of a piece of code, the same level of code indentation to be consistent, the official recommendation is 4 spaces.

tip: Indentationerror, there are indentation errors in the code.

Small exercise:

# Guess Luck number,n=6

# Guess the number is bigger than 6, hint a little bit

# Guess the number is smaller than 6, hint bigger

#猜的数字等于6, Tip Bingo

Code:

1 #!user/bin/env Python32 #-*-CODING:GBK-*-3Luck_num = 194input_num = Int (input ("Please input the luck num:"))5 ifInput_num = = 19:6     Print("bingo!")7 elifInput_num >Luck_num:8     Print("The num is bigger!")9 Else:Ten     Print("The num is smaller")

Introduce loop while, add number limit, code:

1 #!user/bin/env Python32 #-*-CODING:GBK-*-3Luck_num = 194input_num = Int (input ("Please input the luck num:"))5 ifInput_num = = 19:6     Print("bingo!")7 elifInput_num >Luck_num:8     Print("The num is bigger!")9 Else:Ten     Print("The num is smaller")

For loop mode:

1  forNum_of_timesinchRange (3):2     #When failure exit after three times.3input_num = Int (input ("Please input the luck num:"))4     ifInput_num = = 19:5         Print("bingo!")6          Break7     elifInput_num >Luck_num:8         Print("The num is bigger!")9     Else:Ten         Print("The num is smaller") One Else: A     Print("You try too many times.")

Three conditional judgments and loops of Python Foundation