1+2+3+n;1*1*2*n

#1+2+3+...100
# sum = 0
# n = 1
# while n < 101:
#     sum = sum + n
#     n +=1
#     print(sum)

#1+2+3+...100
# sum = 0
# for n in range(1,101):
#     sum = sum +n
# print(sum)

#1*1*2*3..*10
# sum = 1
# n = 1
# while n < 11:
#     sum = sum*n
#     n +=1
# print(sum)