HTML: With the concept of HTML (HyperText Markup Language), we set the structure of our website so that the website could have formal visibility. The elements get used in the format of tags. Here you can set headings, paragraphs, images etc... HTML is a simple concept and one can even learn the same in a week or so.
CSS: The concept of CSS (Cascading Style Sheet) is used to give style to the created HTML which will add some grace on the web page. Elements like effects, background images, fonts etc... can be set so that the website could look beautiful.
In the first step, visit the test site at which you are working and form a new folder with the name "Scripts". Under the same newly created folder, make a new file and give it a name of 'main.js' Don't forget to save the folder 'Script'. Now go to the 2nd step.
Here, you need to go into the file 'index.html' and simply add the below-mentioned code before the clogging the tag
After adding the above add the below-mentioned code in the main.js file which you have created in step 2.
let myHeading = document.querySelector('h1');
myHeading.textContent = 'Hello Gujrat!';