sum of n natural numbers in python

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Giada
26 Nov 2018
1# Sum of natural numbers up to num
2
3num = 16
4
5if num < 0:
6   print("Enter a positive number")
7else:
8   sum = 0
9   # use while loop to iterate until zero
10   while(num > 0):
11       sum += num
12       num -= 1
13   print("The sum is", sum)
14
Lisa
14 Jan 2017
1#include<bits/stdc++.h>
2using namespace std;
3int main()
4{
5	int n;
6	int sum=0;
7	cin>>n;
8	for(int i=1;i<=n;i++)
9	{
10		sum+=i;
11	}
12		cout<<sum<<" ";
13	cout<<endl;
14	return 0;
15}
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