the uses of recursion in c++ code example

Example 1: recursion in c++

//AUTHOR:praveen
//Function calling itself 
//Example in c++
#include<iostream>
using namespace std;
int recursion(int a){
  	if(a==1)//BASE CASE
      return 0;
	cout<<a;
  	a=a-1;
  	return recursion(a);//FUNCTION CALLING ITSELF
}
int main(){
  	int a=5; 
	recursion(a);
  	return 0;
}
//OUTPUT: 5 4 3 2

Example 2: recursion in c++

//recursion in c++
//factorial
#include<iostream>
#include<bits/stdc++.h>
using namespace std;

int factorialfun(int num)
{
	if (num>0)
	{
		return num*factorialfun(num-1);
	}
	else
	{
		return 1;
	}
}
int main()
{
	int num;
	cin>>num;
	cout<<factorialfun(num);
}