# Demonstrate recursion : function recursion « Function « C++ Tutorial

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 C++ Tutorial » Function » function recursion
7.11.1.Demonstrate recursion
 ```#include   using namespace std;    int f(int n);    int main()  {    // use recursive version    cout << "4 factorial is " << f(4);      return 0;  }    int f(int n)   {    int answer;      if(n==1)         return(1);       answer = f(n-1)*n;    return(answer);  }```
`4 factorial is 24`
 7.11.function recursion 7.11.1. Demonstrate recursion 7.11.2. Print a string backwards using recursion 7.11.3. Recursive factorial function 7.11.4. The recursive fibonacci function. 7.11.5. The iterative factorial method.