JavaScript/Array.html at main · AnilSathi23/JavaScript · GitHub

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<!DOCTYPE html>
<html>
    <head>

    </head>
    <body>
        <h3> Javascript array </h3>
        <script>
            let name = [];
            console.log(name);//[]
            let course = ["CSS" ,"HTML","Javascript" , "PHP" , "Vuejs"];
            console.log(course);

          // creating array consturtor
          let subject = new Array();
          //add element in the array
          subject.push("Maths");//1
          subject.push("Science");//2
          subject.unshift("Social Science ");// index 0
          console.log(subject);
          let sub_name = new Array("Java", "advance java" , "spring boot");
          console.log(sub_name) ;

          // initializing Array while declaring
          let arr = new Array(3);
          arr[0] = 100;
          arr[1] = 200;
          arr[2] = 300;
          console.log(arr);console.log(arr[1]);
          // replacing exsisting value
          arr[0] = "bootstrap";
          console.log(arr);

          //remove  elements from an array using pop() and shift() methods
          let courses = ["HTML", "CSS", "Javascript", "React", "Node.js"];
          console.log("oriignal array : "+courses);

          let lastelement = courses.pop();
          console.log("lastelement : "+lastelement);

          let firstele = courses.shift();
          console.log("First element removed : "+firstele);

          courses.splice(1 , 2);//removing two element starting from second position
          console.log("After removing 2 elements starting from index 1 :"+courses)

         // increse  or decrease array size
         let users = ["A" ,"b","c","x","Z","y"];// length is 6
         console.log(users.length);

         users.length = 10;//increase the array size by setting the

         console.log("after increasing the length of the array "+users);

         users.length = 2;//decreasing the array size by setting the length property
         console.log("after decreasing the length of the array "+users);


         //join method - helps to join two arrays as a string
         console.log("join method")
         var fruits=["apple","banana","cherry"];
         console.log(" after join : "+fruits.join('|'));
         var colors=['red','blue','green'];
         //concate method
         let newArr = fruits.concat(colors);
         console.log(newArr);

        </script>
    </body>
</html>