Python Program to Find the Sum of Natural Numbers

Code:

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:

Execute and get the output.


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