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Program 48: Write a C++ program to calculate the sum of numbers from 1 to n using recursion.

using namespace std;

int sum(int n)
		return n;
		return n+sum(n-1);

int main()
	int num;
	cout<<"\nenter a number : ";
	cout<<"\nsum of "<<num<<" natural numbers : "<<sum(num);
	return 0;

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