Chapter 5, Problem 7R

Explanation of Solution

Recursive method for Harmonic number:

The recursive method for harmonic number is given below:

Create the method harmonic() that accepts the input parameter as “n” to calculate and return the harmonic number.

//Define the harmonic() method

public static double harmonic(int n)

{

  //Check whether "n" is equal to "1"

  if(n == 1)

  //Return the value "1"

  return 1.0;

  //Otherwise, call the harmonic() method recursively

  else

  //Return the harmonic number for "n" number

  return harmonic(n - 1) + (1...