JavaScript String Methods

Hello there. Welcome to another interesting lesson on JavaScript. Here we shall be looking at string methods. Before going any further, if you are new to this our amazing platform, please do well to check on our previous lessons so as to be on track. We all know what strings are right? If you have forgotten, no need to panic. We got you covered.

Strings are a fundamental part of all programming languages. In JS, a string is any text inside double or single quotes. They store a series of characters like “Trycoder”, “JavaScript”, and so on. Hence string methods assist you in carrying out a variety of string operations. 

There are so many string methods that are available in JS such as concat( ) that joins strings together, indexOf( ) that returns the index of a specified text that is found in a given string, replace( ) which replaces a specified value with another value in a string, etc. In this lesson, we shall take a look at a few of them. 

Let us consider the case of string concatenation. We will be making use of the concat( ) method on two stings below.

var string1 =  “I am a student, and I am ”;
var string2 = “learning javaScript”;
var string3 = string1.concat(string2);

The code gives rise to the following output.

You can see clearly from the output that the two strings have been concatenated (in other words, joint together). This is an example of how the concat( ) string method is being used.

Let us go further by looking at another example. In this case, let’s make use of the replace( ) method to replace “student” with “ programmer”. Consider the following code

var string1 =  “I am a student, and I am ”;
console.log(string1.replace(“student”, “programmer”));

Let us see what the code does.

There you go. Isn’t this exciting? You get to see the beauty of JavaScript as we get further into the course. 

Another very important and most common string method is the .length that returns the length of the string. Let us try to get the length of our first string.

var string1 = “I am a student, and I am”
console.log(string1.length);

The output is seen below.

Is it working? It’s working. This means our string has 24 characters, including inline spaces.

So we have come to the end of this session. I hope it was an exciting and very educative lesson. For more, stay tuned to this platform. We wish you the best as you code.