JavaScript Practice Questions And Answer

Problem: Create BankAccount Management App to store, delete records of Bank Account. Store accNo, customer name, balance.
Solution:
            <html>
             <head>
              <script>
                var a1 = { accNo:101, name:"Sumit", balance:45000}
                var a2 = { accNo:102, name:"Megha", balance:123500}
                var accArray = [a1, a2]
                function addAccount()
                {
                      var accObj = { }
                      accObj.accNo = parseInt(document.getElementById("input1").value)
                      accObj.name = document.getElementById("input2").value
                      accObj.balance = parseFloat(document.getElementById("input3").value)
                      accArray.push(accObj)
                      document.getElementById("input1").value=""
                      document.getElementById("input2").value=""
                      document.getElementById("input3").value=""
                      display()
                    }
                    function deleteData(accNo)
                    {
                      alert("deleted: "+accNo)
                      for(i=0;i<accArray.length;i++)
                      {
                        var accObj = accArray[i]
                        if(accNo == accObj.accNo){
                          accArray.splice(i,1) //
                          display()
                          break
                        }
                      }
                    }
                    function display()
                    {
                      let divOutput = document.getElementById("output")
                      divOutput.innerHTML=""
                      for(acc of accArray)
                      {
                       var str = acc.accNo +","+acc.name +","+ acc.balance+"  "
                       var delButton =  "<input type='button' value='Delete' onclick='deleteData(" + 
                                            acc.accNo+")' />"
                        str=str+delButton + "<br>"
                       divOutput.innerHTML = divOutput.innerHTML+str
                      }
                    }
               </script>
            </head>
            <body>
                <input type="button" value="Display" onclick="display()" /><br>
                <input type="text" placeholder="Acc Number" id="input1" /><br>
                <input type="text" placeholder="Name" id="input2" /><br>
                <input type="text" placeholder="Balance" id="input3" /><br>
                <input type="button" value="Add" onclick="addAccount()" /><br>
                <br>
                <div id="output" style="background-color: greenyellow;">
                    accounts
                </div>
            </body>
        </html>
          

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