while loop

Question

how to make,
input: 10
output : 10 + 8 + 6 + 4 + 2 + 0 = 30
using while. please help😊😊. thanks

Answer 1

i = int(input())
sum = 0
while i > 0:
sum += i
i -= 2
print(str(sum))

Answer 2

its output is an even number of inputs countdown until 0
thanks before