Question

python中 怎么用while loop算数量

Your Python program will do the following:

Create an empty list
Use a for loop to ask the user for 10 numbers. Add each number to your list using the append method.
Use another for loop to print the list in reverse order, one per line
Use a while loop to count how many positive numbers are in the list
Here is one example of how the program should look when it runs (user input is in red):

Enter a number: 3
Enter a number: 2
Enter a number: -4
Enter a number: 10
Enter a number: -8
Enter a number: 17
Enter a number: -20
Enter a number: 30
Enter a number: -5
Enter a number: -2

Reversed list:
-2
-5
30
-20
17
-8
10
-4
2
3

Positive count: 5

Answer 1

循环里break出来不执行else, 否则执行else。主要就是用来判断循环是不是正常结束的。