please is there any inbuilt function for harmonic function?

Please write a script of function for harmonic function summation of 1/n for n=1 to infinity

Answer 1

[Rik]

There actually is a builtin that will give you the answer:

inf

As for implementing the function yourself, that is probably homework, so I'll leave it to you try something. Feel free to post a comment with your efforts and what questions you have.