# Sum of first n natural numbers
Nterms = int(input("Enter number of terms:"))
total = 0
for idx in range(1, Nterms+1,1):
total += idx
print("Sum of first",Nterms,"natural numbers = ", total)
Nterms = int(input("Enter number of terms:"))
total = 0
for idx in range(1, Nterms+1,1):
total += idx
print("Sum of first",Nterms,"natural numbers = ", total)
