n natural numbers
Method 1:
num = int(input("Enter the Number:"))
value = 0
for i in range(1, num+1):
value = value + i
print("Sum of N natural numbers:", value)
Method 2:
num = int(input("Enter the Number:"))
sum = (num * (num+1))/2
print("The Sum of N natural Number is {}".format(sum))
# This code is contributed by Shubhanshu Arya (Prepinsta Placement Cell Student)