# Program to count the digits of a given number using recursion in C++.

**Solution** :

#include <iostream> using namespace std; int CountD(int n) { static int count=0; if (n > 0) { count++; CountD(n/10); } return count; } int main() { int n, ans; cout<<"Enter a Number :- "; cin>>n; ans=CountD(n); cout<<"Total Number of Digits are :- "<<ans; return 0; }

**Output** :

Enter a Number :- 153 Total Number of Digits are :- 3