Print Name n times using recursion

Problem Statement:

Write a program that prints a given name n times using recursion.

Problem Understanding

To tackle this problem, we need to understand the recursive nature of printing the name n times. Recursion involves breaking down a problem into smaller instances of the same problem until a base case is reached. In this case, the base case occurs when the number of times to print the name (n) becomes zero or negative

Different Approach

1️⃣ Using Recursion

Code:

#include <iostream>

void printNameNTimes(const std::string& name, int n) {
    // Base case: If n is 0 or negative, return without printing anything
    if (n <= 0) {
        return;
    }
    
    // Print the name
    std::cout << name << std::endl;
    
    // Recursively call printNameNTimes with n-1
    printNameNTimes(name, n - 1);
}

int main() {
    std::string name;
    int n;

    // Prompt the user to enter their name
    std::cout << "Enter your name: ";
    std::cin >> name;

    // Prompt the user to enter the number of times to print the name
    std::cout << "How many times would you like to print your name? ";
    std::cin >> n;

    // Call the recursive function to print the name n times
    printNameNTimes(name, n);

    return 0;
}

Complexity Analysis:

• Time Complexity:
  • The function printNameNTimes is called recursively n times.
  • Each recursive call performs a constant amount of work (printing the name) which can be considered O(1) time complexity.
  • Therefore, the overall time complexity of the solution is O(n), where n is the number of times the name is printed.
• Space Complexity:
  • The space complexity of the solution is O(n) as well, considering the recursive calls create a call stack with n frames, each storing information about the function call.