P27Loops
Loop through a collection
for name in ['christopher','susan',str(10),int(1000),float(1)]:
print(name)
how do i then loop x number of times? The way you do that is by using a built-in little function called range. range will do for you is it will automatically create a list of numbers for you.
Looping a number of times
for index in range(1,6):
print(index)
Looping with a condition
a = input('what you want to do ?')
name = ['na','bi','ss',a]
index = 1
while index < len(name):
print(name[index])
index = index + 1 #change the condition!!
Typically you would want to use a while loop in situations where something is going to change automatically. So if I was maybe reading through a list of lines, inside of a file or someting like that, that's perfect for a while loop.
P28实操
people = ['Christopher','Susan']
for name in people:
print(name)
print()
index = 0
while index < len(people):
print(people[index])
index = index + 1
Python While 循环语句 | 菜鸟教程 GIF动图讲解while
