In programming languages, code is often split up into functions. Functions help to make code reusable, extensible etc.In <a href="https://golang.org/">Go</a> there's a special case: goroutines. So is a goroutine a function? Not exactly. A goroutine is a lightweight thread managed by the Go.If you call a function f like this:

In <a href="https://golang.org">Go</a> you can easily slice <a href="https://golangr.com/strings/">strings</a> or <a href="https://medium.com/rungo/the-anatomy-of-arrays-in-go-24429e4491b7">arrays</a>. As the name implies, a slice is a subset of the whole.This is unlike C where you would have to use strcpy or other tricks to slice a string. (this is a lot of work)Not so in Golang, to take a slice is much easier.

Sorting numbers in <a href="https://golang.org/">Golang</a> is nothing like C. If you don't know about the C language, it makes you write a sorting function yourself. It is much easier in Go. There's a package named sort.This package has several methods to sort:

A loop lets you repeat code. There are different types of loops, one of them is a for loop. For loops in <a href="https://golang.org/">Go (golang)</a> are more similar to C/Java than Python. In Python the syntax isfor i in range(1,10):In C/Java the syntax is

In <a href="https://golang.org/">Golang</a>, Panic is a function that stops the ordinary flow of control and starts panicking.<a href="https://golangr.com/errors/">Errors</a> are for abnormal conditions during program execution, but there are some cases where the program cannot continue executing after something went wrong.In that case you can use panic to terminate the program.

<a href="https://golang.org/">Go</a> is a popular programming language, that at first glance seems a bit like C/Java. The famous hello world program looks like this:package mainimport "fmt"

You can use exponents in <a href="https://golang.org/">Golang</a> (Exponents are shorthand for repeated multiplication of the same thing by itself.).You need to import the math module to do that. It comes with the Pow function. This function works like this:math.Pow(base, exponent)

Many packages have variables (constants). In the <a href="https://golangr.com/">Go</a> programming language, exported <a href="https://golangr.com/variables/">variable</a> names are a bit different.Before playing around with Go packages and constants, you should be able to <a href="https://golangr.com/hello-world/">run go programs</a>For example, if you import the math module you can access some of its variables:

In the <a href="https://golang.org/">Go</a> programming language, <a href="https://golangr.com/methods/">functions</a> are values. That means that you can pass a function as parameter in a function.For example, you can define a function mul which multiplies x and y. Then it returns the result.mul := func(x, y float64) float64 {

<a href="https://golang.org">Go</a> is not a pure object oriented programming language. In truth, Go does not provide classes. Go uses <a href="https://golangr.com/struct/">structs</a> instead.Create a file example.go with the struct student. You can create a new person using this struct as the example shows:package main

In the <a href="https://golang.org">Golang</a> programming language you can use the defer statement. A defer statement defers the execution of a function until the surrounding <a href="https://golangr.com/methods/">function</a> returns.So in practice, that means first finish the current function before executing the deferred function.The program below is a go program that imports the "fmt" module for output and then calls the Println function twice. It uses the defer statement;

<a href="https://golang.org">Go</a> comes with many data structures, including a <a href="https://golangr.com/maps/">map</a> data structure.A (hash)map maps keys to values, this is a common data structure in programming. Many languages support it including Go and Python (dictionary).Unlike an array, it has a one to one mapping. The key can be used to quickly get the value without using a loop

In <a href="https://golang.org/">Golang</a> methods can take <a href="https://golangr.com/struct/">structs</a> as parameter. You may be familiar with this from other languages, where you post objects as <a href="https://golangr.com/methods/">method</a> parameter.This is great, because while Go doesn't support object orientated programming in the traditional sense, this gives you the feel of objects.In this article we'll do an example where a method takes a struct as parameter. First we defin

<a href="https://golang.org/">Go</a> does not have classes or object orientated programming in the traditional sense. But you can define methods on types.In Go, a method is a function with a special receiver argument. For example, we define two methods like that (getX and getY):package main

Typically a function only returns one variable, but why should that be?In the <a href="https://golang.org/">Go</a> programming language, <a href="https://golangr.com/methods/">functions</a> can return multiple values. This is unlike C, where a function only returns one value. However there are other languages that support multiple return, like Python.On syntax we can say, the type of return value is written at the end instead of in the beginning. Where in C you would have

In the <a href="https://golang.org">Go</a> programming language you can create <a href="https://golangr.com/arrays/">arrays</a>: collections.You can create slices with the built-in make() function; you can create dynamically-sized arrays this way.Remember that the usual array has a fixed size, that you would define in one of these two ways:

If you have the <a href="https://golang.org/">Go programming language</a> installed on your computer, you can run Go programs. You can verify this by opening a terminal and typinggo versionIf it outputs an error like "command not found", you should <a href="https://golangr.com/install/">install</a> it.

In <a href="https://python.org">Python</a>, a set is a container whose objects must be unique. If you try to add something that's already in the set, it will not do anything (no error will be thrown).Open the Python <a href="https://pythonprogramminglanguage.com/repl/">interactive shell</a> to try it out. You can define a set by calling the set() method.a = set([1,1,1,1,2,2,2,2,3,3,3,3,3,3,4,4,4])

In <a href="https://python.org">Python</a>, everything is an object (from <a href="https://pythonspot.com/objects-and-classes/">object orientated programming</a>). This is very different from other programming languages like C++, where object oriented programming is more of an addition to the functional language.Python is not a functional language, it is highly object orientated. In Python, every object is derived from a <a href="https://pythonbasics.org/class/">class</a>.Many programming la

Unit testing is a software testing method to test functions in source code. Python has a module for unit testing, <a href="https://docs.python.org/3/library/unittest.html#module-unittest">unittest</a>.This is different from <a href="https://pythonspot.com/python-debugging/">debugging</a>, where you already know the program is not doing what you want.By testing the function (unit testing) you can prevent the program from doing unexpected things. The idea is that you test both good and bad inp