write an octave function that converts the rectangular form (real and complex) of a number to the polar form of a complex number.

Write a C++ function to find nth term of sequence given below, n is passed as argument to the function and function prints the nth term in output. Sequence: 1,4,9,16,25,........n2

Write a C function that takes an integer as input and returns the sum of all its digits.

5. Write a function harmonic that will take an integer n as a parameter and return the result of the harmonic series: Γράψτε μια συνάρτηση harmonic που θα πάρει έναν ακέραιο η ως παράμετρο και θα επιστρέψει το αποτέλεσμα της αρμονικής σειράς: 1 1 -+-+-+ 3 + 2 For example, harmonic (2) = 1.5 and harmonic (3) = 1.833