If you wish to achieve proficiency in Golang development, then you ought to be familiar with strings. If you are coming from a Python, C++ or Java background, then you will find strings to be a bit different in Golang. Each character in strings in Golang is signified by multiple bytes employing the UTF-8 Encoding. But that’s a different story.
In this blog, we will delve into concatenation of a string and how you can build a string. So, let’s start as we have a lot to cover.
String Building and Concatenation in Golang
So what is concatenation? In simple words, concatenation refers to the process of combining/adding two or multiple strings to form a single string. Thus, in a way, you are building new strings as well. Now, there are several ways to concatenate and build a string.
1. Concatenation Operator (Plus Operator)
Now this is a very basic method to concatenate a string. To understand this, let us code. First, we will create a new directory named ‘Strings’ inside go-workspace.
With this, our IDE will open up (VS Code in this case). And we type
You will notice that for creating and initializing s1 and s2, we use the ‘var’ keyword. And for s3, we are using the shorthand declaration. This is just to showcase the different ways you can initialize a string.
The output that we get is shown below:
Thus, you get a new string “Result: First Concatenation Method”
2. String Append
In the String Append method, we will use the ‘+=’ operator.
Here, we initialize two string variables s1 and s2. Then we perform the append method ‘s1 += s2’. Then we add “ Method” to the newly formed (concatenated) s1. This will give me the output “String: Second Concatenation Method”. Let’s see the output now.
3. Strings Join() Function
This is another simple method to concatenate a string in Golang. What this function will do is that it will combine different elements in the slice of a string to create a new string. Let’s see how it works.
This method will come in handy when you will devote yourself fully to Golang development. And if you come across anything intricate, (that you can’t solve by yourself) you can take the help of professional experts for the smooth execution of your project.
6. Repeat Method
As the name suggests, with this method, we can amalgamate the same string a specified number of times to form a different string.
What you have to remember is that in order to use this method, we have to import the strings package. So, let us type the code now.
We can use the builder type to add bytes or runes to the string.
(Side Note: The byte data type refers to ASCII characters. On the contrary, the runes refers to a wide array of Unicode characters as per the encoding in the UTF-8 format. Basically, a rune represents a Unicode code point which is a numerical value that in turn represents a Unicode character)
Using Strings Builder to Create a String from Byte Slices
From the name itself, you can decipher that we will create byte slices and build a string. Here we will deal with ASCII codes.
Thus, you have to be familiar with the ASCII or look for them online.
So, there you have it! The various ways of concatenating and building strings as a result. Now which one should you use? Well, it depends on the program requirement and the complexity. If you want faster processing, then you should go ahead with Strings Builder. Otherwise, if you are working on a simple program, then the Append or Join() function might work well for you.