Saturday 2 March 2019

Sum of Natural Number in Python

# Python program to find the sum of natural numbers up to n where n is provided by user
# change this value for a different result
num = 16
# uncomment to take input from the user
#num = int(input("Enter a number: "))
if num < 0:
print("Enter a positive number")
else:
sum = 0
# use while loop to iterate un till zero
while(num > 0):
sum += num
num -= 1
print("The sum is",sum)
Output:
The sum is 136

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