Write a Python program with a function called harmonic$\_$sum$($n$)$ that calculates the sum of harmonic series of up to n numbers, and returns the result value using recursion.

Harmonic series is defined as $1+1/2+1/3+1/4+...($n terms$)$

Example of program scenario:

Program Prompt: Enter a non$-$negative integer:

User Response: $4$

Program Response: Sum of harmonic series of up to $4$ numbers is $2\mathrm{.}083333333333333$

# Write your program here

def harmonic$\_$sum$($n$)$:

pass

print$($harmonic$\_$sum$(4))$