To find the total sum upto the entered number using recursive function

In this program I have used the recursive function to find the total sum upto which the number user enters. For example if  the user enters 10.
The sum will be displayed 55.
10+9+8+7+6+5+4+3+2+1=55
The main source code of the program is given below:

	#include<stdio.h>
	#include<conio.h>
	int sum(int);
	int main()
	{
	int num,total;
	printf("enter the number upto which sum is to be find");
	scanf("%d",&num);
	total=sum(num);
	printf("total sum upto the entered number =%d",total);
	getch();
	}
	int sum(int n)
	{
	if (n==0)
	return n;
	else
	return (n+sum(n-1));
	}

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