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C++ > Recursion Code Examples

Direct recursion vs indirect recursion

Direct recursion vs indirect recursion

Direct recursion: When function calls itself, it is called direct recursion, the example we have seen above is a direct recursion example.

Indirect recursion: When function calls another function and that function calls the calling function, then this is called indirect recursion. For example: function A calls function B and Function B calls function A.
Indirect Recursion Example in C++

#include <iostream>
using namespace std;
int fa(int);
int fb(int);
int fa(int n){
   if(n<=1)
      return 1;
   else
      return n*fb(n-1);
}
int fb(int n){
   if(n<=1)
      return 1;
   else
      return n*fa(n-1);
}
int main(){
   int num=5;
   cout<<fa(num);
   return 0;
}

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