Пример кода суммы первых n нечетных чисел с использованием для цикла
def OddSummation(n):
total = 0
for i in range(1,n,2):
total+=i
return total
def main():
number = int(input("Enter the number: "))
print("The summation of all the odd numbers between 1 and ",number, " is ", OddSummation(number))
main()
Outrageous Ostrich