Analyzing then determine primary Python 5 (d)

First, review

Branch : completion of the test and is called the branch judgment based on the results.

Block : the line or lines of code together

Indent : a line of code a little bit to the right

Relational operator (comparison operator) : ==,>,> =, <, <=, =,!

Logical Operators :

and: at the same time is true

or: any one is true

Second, a plurality of test conditions

1, not

Denotes the inverse logic, not used

int = Age (the INPUT ( " Please enter your age: " ))
 IF  not (Age <8 ):
     Print ( " you can join basketball team " )
 the else :
     Print ( " I'm sorry, you can not participate in the basketball team ." )

Not removing said:

int = Age (the INPUT ( " Please enter your age: " ))
 IF Age> = 8 :
     Print ( " you can join basketball team " )
 the else :
     Print ( " I'm sorry, you can not participate in the basketball team ." )

 

Exercise:

1, input age, age, senior grade, if older than 8 and equal to Grade 3 or greater, you can output the basketball team, otherwise output'm sorry, you can not participate in the basketball team

Age = int (the INPUT ( " Please enter your age: " )) 
Grade = int (the INPUT ( " Please enter your grade: " ))
 IF Age> = 8 and Grade> = 3 :
     Print ( " you can participate in basketball the team " )
 the else :
     Print ( " I'm sorry, you can not participate in the basketball team . " )

How will this judgment into a test of containing or:

Age = int (the INPUT ( " Please enter your age: " )) 
Grade = int (the INPUT ( " Please enter your grade: " ))
 IF  not (Age> = 8) or  not (Grade> = 3 ):
     Print ( " I'm sorry, you can not participate in the basketball team " )
 the else :
     Print ( " you can join the basketball team ." )

 

2. Enter the color you like color, if you like blue or blue-green, output You can play this game, otherwise the output I'm sorry, you can not play this game

the INPUT = Color ( " Please enter your favorite color: " )
 IF Color == " Blue "  or Color == " Green " :
     Print ( " You can play this game " )
 the else :
     Print ( " I'm sorry, you can not play this game . " )

Will convert it to contain and test

the INPUT = Color ( " Please enter your favorite color: " )
 IF  not (Color == " Blue " ) and  not (Color == " Green " ):
     Print ( " I'm sorry, you can not play this game " )
 the else :
     Print ( " you can play this game ." )

 

3. Enter your age age, grade and grades favorite color, if older than 8 and equal to Grade 3 or greater, while like blue or green, you can participate in the output basketball game, otherwise you can not participate in the basketball game output

Age = int (the INPUT ( " Please enter your age: " )) 
Grade = int (the INPUT ( " Please enter your grade: " )) 
Color = the INPUT ( " Please enter your favorite color: " )
 IF Age> = 8 and Grade> = 3 and (== Color " Blue "  or Color == " Green " ):
     Print ( " you can join the basketball team game " )
 the else :
     Print ( " I'm sorry, you can not participate in the race basket " )

 

Homework:

1, a mall promotion in reduced order. If the amount is less than or equal to the purchase price of 100 yuan, will give a 10% discount, if the purchase amount is greater than $ 100, will give a 20% discount. Write a program that asks the purchase price, and then show discount (10% or 20%) and the final price

AMOUNT = float (the INPUT ( " Please enter the amount: " ))
 IF AMOUNT <= 100 :
     Print ( " discount: 10%, the amount due: " , AMOUNT * (1 - 0.1 ))
 the else :
     Print ( " discount: 20%, the amount shall be: " , aMOUNT * (1 - 0.2))

2, a women's soccer team looking for younger girls between 10-12 years of age to join. Write a program that asks the user's age and gender (male or female), if the person between the ages of 10-12 years old, and a girl, the output can participate in football, otherwise the output I'm sorry, you can not participate in the football team.

int = Age (the INPUT ( " Please enter your age: " )) 
Sex = int (the INPUT ( " Please enter your gender: " ))
 IF Age> = 10 and Age <= 12 and Sex == " female " :
     Print ( " you can participate in soccer team " )
 the else :
     Print ( " you can not participate in the football team " )

3, the previous question, the rational optimization, if the user is not the age of the girls do not have to ask

the INPUT = Sex ( " Please enter your gender: " )
 IF  not Sex == " female " :
     Print ( " I'm sorry, you are not a girl, not to participate in women's soccer team " )
 the else : 
    Age = int (the INPUT ( " Please enter your age: " ))
     IF Age> = 10 and Age <= 12 :
         Print ( " you can participate in the women's soccer team " )
     the else :
         Print ( " I'm sorry, you can not participate in the women's soccer team . " )