What's the meaning of this coding?

[xin2408]

What's the meaning of this code? Could someone please explain this to me? Thanks!

temp = input('Please enter a number:')
number = int(temp)
i = 1
while number:
    print(i)
    i = i + 1
    number = number - 1

I could write the first two lines but the later on of i = i +1 & number = number -1
What's the relationship between the number and i?