# sum = 0 
# for i in [3, 6, 9]:
#     sum = sum + i
# print(sum)

# i = 1
# while i < 11:
#     print(i)
#     i+=1

# i = 10
# while i >= 1:
#     print(i)
#     i-=1

# for i in [1,2,3,4,5,6,7,8,9,10]:
#     print(i)

# for i in range(1, 11):
#     print(i)

# for i in range(10, 0, -1):
#     print(i)