问题
I want to have a for loop like so:
for counter in range(10,0):
print counter,
and the output should be 10 9 8 7 6 5 4 3 2 1
回答1:
a = " ".join(str(i) for i in range(10, 0, -1))
print (a)
回答2:
Check out the range documentation, you have to define a negative step:
>>> range(10, 0, -1)
[10, 9, 8, 7, 6, 5, 4, 3, 2, 1]
回答3:
You need to give the range a -1 step
for i in range(10,0,-1):
print i
回答4:
for i in range(10,0,-1):
print i,
The range() function will include the first value and exclude the second.
回答5:
range step should be -1
for k in range(10,0,-1):
print k
来源：https://stackoverflow.com/questions/4767401/decrementing-for-loops