练习32--循环和列表

for iterating_var in sequence:
　　statements(s)

 1 the_count = [1,2,3,4,5]
 2 fruits = [‘apples‘,‘oranges‘,‘pears‘,‘apricots‘]
 3 changes = [1,‘pennies‘,2,‘dimes‘,3,‘quarters‘]
 4 
 5 # this first kind of for-loop goes through a list
 6 for number in the_count:
 7     print(f"This is count {number}")
 8 
 9 # same as above
10 for fruit in fruits:
11     print(f"A fruit of type:{fruit}")
12 
13 # also we can go through mixed lists too 
14 # notice we have to use {} since we don‘t know what‘s in it
15 for i in changes:
16     print(f"I got{i}")
17 
18 # we can also build lists,first start with an empty one
19 elements = []
20 
21 # then use the range function to do 0 to 5 counts
22 for i in range(0,6):
23     print(f"Adding {i} to the list.")
24     # append is a function that lists understand
25     elements.append(i)
26 
27 # now we can print them out too
28 for i in elements:
29     print(f"Element was: {i}")

PS E:\3_work\4_python\2_code_python\02_LearnPythonTheHardWay> python ex32.py
This is count 1
This is count 2
This is count 3
This is count 4
This is count 5
A fruit of type:apples
A fruit of type:oranges
A fruit of type:pears
A fruit of type:apricots
I got1
I gotpennies
I got2
I gotdimes
I got3
I gotquarters
Adding 0 to the list.
Adding 1 to the list.
Adding 2 to the list.
Adding 3 to the list.
Adding 4 to the list.
Adding 5 to the list.
Element was: 0
Element was: 1
Element was: 2
Element was: 3
Element was: 4
Element was: 5