Lesson1:python Judgment Expression Application

1/5/2016 Judgment Expression Application

Sample1:

Salary=raw_input ("Please input your salary:")

If salary>=10000:

Print "You can eat twice! ^_^"

Elif 5000<= Salary <10000:

Print "You Can eat once!-_-"

else salary<5000:

Print "You can not eat anything! #_ #!"

The Issue1:salary start assignment is a string type, and the subsequent judgment value is integer, which requires a data type conversion before the expression is evaluated, salary=int (salary).

The Issue2:salary str type always executes the first branch statement before it is converted to an integer, because the string type is always larger than the int type.

Issue3: On the last branch judgment, use the Else statement directly, without adding any conditions, and if you add a condition after else, a syntax error occurs, and in the previous example else: =elif salary<5000:

Lesson1:python Judgment Expression Application