Answer:
//Begin class declaration
public class RecursiveFunction {
//Write function
//It takes in an int value as parameter
//And returns a string value.
public static String recursivefn(int n){
//Check the value of variable n
//If the value is less than or equal to 0
//Return the string "0"
if(n <= 0){
return "0";
}
//If n is not less than or equal to zero,
//return a string that has:
//1. n,
//2. followed by a space,
//3. followed by another call to the function with n - 1
//4. followed by a space,
//5. followed by n
return n + " " + recursivefn(n-1) + " " + n;
}
//Begin main method
public static void main(String []args){
//Call the recursivefn() on 5
System.out.println(recursivefn(5));
} //End of main method
} //End of class declaration
Sample Output:
5 4 3 2 1 0 1 2 3 4 5
Explanation:
The code has been written in Java. It contains comments explaining important parts of the code. Please go through the comments.
A sample output has also been provided.
The program file and a screenshot of the output have also been attached to this response.
