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...

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