We use the keyword go to create a goroutine, so when we call a function or method with that prefix, a goroutine is executed. Think of these like threads, but they are much easier and more lightweight. These are determined by how we call them. So, what are goroutines? They are methods or functions that run alongside other methods or functions. Only a single core or processor is used for a Go program, regardless of the goroutines running. Go emphasizes concurrency rather than parallelism because Go programs may not be parallel by default. Unlike Java, concurrency support is baked into the language with specific types (chan), keywords ( go, select) and constructs (goroutines). The basic building blocks for structuring concurrent programs are goroutines and channels.
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These are programs that execute different pieces of code simultaneously. Go comes with built-in support for concurrent applications. The syntax of the append method is: slice = append(slice, elem1, elem2. Additionally, slices come with the built-in append, which can return a slice that contains one or more new values. package mainįmt.Println(reflect.ValueOf(intSlice).Kind())įmt.Println(reflect.ValueOf(strSlice).Kind())Ī slice, unlike an array, can change during execution. To declare the type for a variable with a slice, we use with the type of elements for the slice. If a statement is true, the body between the If-else: this construct tests for a conditional statement, either logical or boolean. Let’s take a deeper look at Go control structures. We do not use parentheses, and the bodies are brace-delimited. There are also new control structures, such as a type switch and select. There are no do or while loop instead, Go uses flexible for and switch loops. Intermediate concepts of Go Control structuresĬontrol structures are similar to that of C, but they are generally more simplified and flexible. There is also a shorthand for declaring variables. This process is called assigning a variable. We must also give a value to our variables using the = operator. When we declare a variable in Go, memory is initialized. Unlike other C-family languages, we write type after the variable identifier. In this example, identifier is the name of the variable, and type is the type.
To declare a variable, we use the var keyword. In Go, a structured type has no inherent value but rather the default value nil.Ī variable is a value that can be changed during execution.
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It speeds up the software development process while not compromising on efficiency. Go attempts to meet some common needs that developers face. Similar to Python and Ruby, it also integrates many features of dynamic programming. Go belongs to the C-family, so it shares many beloved syntactic similarities to languages like Java and C++, but Go offers a more concise syntax, so it’s easier to learn and read. It can handle heavy server-centric web services, text-processing problem, and heavy-duty distributed applications.įamiliar and easy to learn. Go can be used for all kinds of software development solutions such as a system programming language, a general programming language, or general support. In that respect, Go is hybrid, utilizing the best features of many languages with a clear, expressive type system while remaining lightweight and easy to learn. Go was intentionally designed to exclude the more “heavy-weight” features of OOP. It brings some of the great features of object-oriented programming, like interfaces, but does not include some of the pitfalls. Go is essentially an imperative language that accommodates concurrency concepts.
Go improves upon these aspects of programming languages and simplifies the working environment for developers. It is compiled, simple, concurrent, statically-typed, and efficient. This general-purpose programming language includes many great features from other programming languages.
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