The greatest common divisor (or GCD) of two integers is the largest positive integer that divides two of these integers. The first of the Recursion problems on the Functional track at Hackerrank is

This is the last from the introductional problems in the Functional Programming domain on Hackerrank. This also might be most complicated among the introductionary problems: You are given the cartesian coordinates of a

The problem of computing perimeter of the polygon is one of the easy problems, but it requires a bit more programming. You are given the cartesian coordinates of a set of points in

The Functions or Not? problem is defined as follows: You are given a set of unique (x, y) ordered pairs constituting a relation. For each of these relations, identify whether they may possibly

The last one from reduction problems is following: Reduce the following expression, using the beta-rule, to no more than one term. If the expression cannot be reduced, enter "CAN'T REDUCE". (λg.

The next problem, Area Under Curves and Volume of Revolving a Curve, in mathematically advance so I introduce some therms and facts first. Numerical integration is the measuring the area between function and

The problem Evaluating e^x: The series expansion of eˣ is given by $$1 + x + \frac{x^2} {2!} + \frac{x^3} {3!} + \frac{x^4} {4!} + ...$$ Evaluate eˣ for given values of

The problem Updating List requires learning how to generate one list from another. Update the values of a list with their absolute values. In many other programming languages the common approach is to

The problem List Length is interesting because it can be solved using mutable counter but it also can be solved in more functional way. Count the number of elements in an array without

The problem Sum of Odd Elements: You are given a list. Return the sum of odd elements from the given list. The solusion is basically just an invocation of the List.fold from

The problem Reverse a List encourages to learn List.rev. You are given a list of elements. Reverse the list without using the reverse function. The simplest implementation is not very efficient one

The problem Array Of N Elements requires to write the function that returns N items. The string serialisation of the data structure should be very specific and similar to [ 1, 2, 3 ]. In

The next one is Filter Positions in a List: For a given list with N integers, return a new list removing the elements at odd positions. There are a few methods in the

The next HackerRank functional problem is Filter Array. Filter a given array of integers and output only those values that are less than a specified value X. The idea is to create a

This is going to be more interesting than[1] previous[2] three[3]. Given a list, repeat each element in the list n amount of times. The first line of the input is

One more HR F# challenge for today - Hello World N Times: Print "Hello World" N amount of times. ... A single line of input containing integer N, the number of times

The second F# challenge on HackerRank is to write Hello World program in F#. This is a fairly simple program. This program defines F# function and calls it from the main method. The

Couple of years ago I had a good time practicing Go by solving a number of programming challenges on Hackerrank. This time I will try solve functional challenges using F#. There is the