The challenge For a given list [x1, x2, x3, …, xn] compute the last (decimal) digit of x1 ^ (x2 ^ (x3 ^ (… ^ xn))). Example: because 3… Read More »How to Find the Last Digit of a Huge Number in Golang

The challenge An array is circularly sorted if the elements are sorted in ascending order but displaced, or rotated, by any number of steps. Complete the function/method… Read More »How to Circularly Sort an Array in Golang

The challenge Write a function toWeirdCase (weirdcase in Ruby) that accepts a string, and returns the same string with all even indexed characters in each word uppercased, and… Read More »How to Alternate String Casing in Golang

The challenge Create a function that takes a Roman numeral as its argument and returns its value as a numeric decimal integer. You don’t need… Read More »Roman Numerals Decoder in Golang

The challenge Clock shows h hours, m minutes and s seconds after midnight. Your task is to write a function that returns the time since midnight in milliseconds. Example: Input constraints:… Read More »How to Subtract from Time in Golang

The challenge Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary… Read More »Bit Counting in Golang

The challenge Find the next higher number (int) with same ‘1’- Bits. I.e. as much 1 bits as before and output next higher than input. Input is… Read More »How to Find Next Higher Number with Same Bits in Golang

The challenge Write a function named first_non_repeating_letter that takes a string input, and returns the first character that is not repeated anywhere in the string. For example,… Read More »How to Find the First Non-Repeating Character in Golang

The challenge Return the last digit of the nth element in the Fibonacci sequence (starting with 1,1, to be extra clear, not with 0,1 or… Read More »How to Find the Last Fibonacci Digit in Golang

The challenge Write an algorithm that will identify valid IPv4 addresses in dot-decimal format. IPs should be considered valid if they consist of four octets,… Read More »How to Validate an IP Address in Golang

Fmt provides printing to standard output (usually the console) and formatting of strings capabilities. The basics of Print and Println The main difference between fmt.Print… Read More »Formatting Strings with Fmt in Golang

Reading from “standard input” is really useful if you are making a command-line application and require user input. First setup a new bufio reader, then… Read More »How to Read from Standard Input in Golang