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JavaScript Practice Questions And Answer

Problem: Write a program to search an element in an array.
Solution:

            <html>
             <head>
              <script>
               function demo1()
             {
                let marks = [89, 67, 88,  34, 92, 65,11, 90]
                let inputBox = document.getElementById("input1")
                let n = parseInt(inputBox.value)
                for(i=0;i<marks.length;i++)
                {
                  if(marks[i] == n)
                    {
                     document.write("<br> found at pos "+i)
                     break;   
                    }
                     if(i == marks.length-1){
                      document.write("<br> not found")
                  }
              }
            }
       </script>
    </head>
    <body>
        <input type="text" id="input1" placeholder="Enter a number" />
        <br><br>
        <input type="button" value="Search" onclick="demo1()"/><br>
    </body>
</html>

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