app.js

function HI() {
    alert("HI");
}

// /// CHAPTER 31-34  /// //

// Q NO. 1

var date = new Date();

function dateNow() {
    document.write(date);
}


// Q NO. 2

var months = ["Jan", "Feb","March", "April", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec" ];
var today = new Date();

function currentMonth() {
    alert(months[today.getMonth()]);
}


// Q NO. 3

var days = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
var today = new Date();

function dayNow() {
    alert(days[today.getDay()]);
}


// Q NO. 4

// var funday = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
// var lazyday = new Date();

// function funday2(){
//     if(lazyday == funday[lazyday.getDay(0,6)]){
//         alert("It's Funday");
//     }
// }

// if (lazyday==funday[lazyday.getDay()]) {
//     alert("It's Funday");
// }


// Q NO. 5

var now = new Date();
var currentDate = now.getDate();

function mntEnd() {
    if (currentDate <= 15) {
        alert("First fifteen days of the month");
    }
    else{
        alert("Last fifteen days of the month");
    }
}


// Q NO. 6

var now = new Date();
document.write("<br><br>Current Date: " + now);
document.write("<br>Elapsed MilliSeconds since January 1, 1970: " + now.getTime());
document.write("<br>Elapsed MilliSeconds since January 1, 1970: " + now.setFullYear(1970));


// Q NO. 7

function CheckPm() {
    var now = new Date();

    if (now >= 0000 && 1200) {
        alert("It's AM");
    }
    else {
        alert("It's PM");
    }
}


// Q NO. 8

function lastDae() {
    var laterDate = new Date("Dec 31 2020");
    alert(laterDate);
}


// Q NO. 9


// Q NO. 10


// Q NO. 11

// var now = new Date();
// console.log(now);
// console.log(now.getHours() - 1);


// Q NO. 12

function backInTime() {
    var now = new Date("dec 5 2015");
    alert("Current Date: " + now);

    var years1000Ago = new Date("dec 5 1915");
    alert("100 years back: " + years1000Ago);

    alert("Time Travelling Over!");
    alert("Thank You Come Back Again!");
}


// Q NO. 13

function ageCalculator() {
    var userAge = +prompt("Enter Your Age:");
    var now = new Date();
    var currentYear = now.getFullYear();
    alert("Your Age: " + userAge);
    alert("Your Birth Year: " + (currentYear - userAge));
}


// Q NO. 14

function ElectricBill() {
    var userName = prompt("Enter Your Name:");
    var months = ["Jan", "Feb", "March", "April", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec"];
    var today = new Date();

    var monthNow = months[today.getMonth()];
    var noOfunits = prompt("Enter Number Of Units");
    var unitCharges = 16;

    var netAmount = noOfunits * unitCharges;
    var lateCharge = 350;
    var grossAmount = netAmount + lateCharge;

    document.write("<h1>K-Electric Bill</h1><br><br>");

    document.write("Customer Name: " + userName);
    document.write("<br>Month: " + monthNow);
    document.write("<br>Number Of Units: " + noOfunits);
    document.write("<br>Charges Per Units: " + unitCharges);
    document.write("<br>Net Amount Payable (Within Due Date): " + netAmount);
    document.write("<br>Late Payment Surcharge: " + lateCharge);
    document.write("<br>Gross Amount Payable (After Due Date): " + grossAmount);
}