app.js

// chapter 1
// alert("FirstNAME" + " SHAHMEER");

// alert("LasttNAME" + " NADEEM");
// alert("Email" + " shah.khan.5757@gmail.com");
// alert("Number" + " 0333-2569366");
// alert("Password" + "  kkokoko");
// Correct this statement: alert"You're learning JavaScript!";
// alert("You're Learning Javascript");
// Code an alert statement displaying any message you like.
// alert("Welcome to this Page");

// chapter 2
// var someVar;

// var str;


// var str = "Hello there";


// alert(str);


// var TeamName = " KARACHI KINGS"
// alert("TeamName is" + TeamName);
// var bestMan = "AMIR";

// var bestMan = "BABAR";


// alert(bestMan)

//CHAPTER 3://
// var caseQty = 144;

// var num = +"9";


// var sum;
// var sum = caseQty + num;


// alert(sum);
// var merchTotal = 100;


// var shippingCharge = 10;
// var orderTotal = merchTotal + shippingCharge;


// alert(orderTotal); //ANSWER IS 110;
// var a = 15;
// var b = a + 29;



// alert(b);

// chapter 4
// var productcost = 3.45;


// var Nameofband = "SomeBandName";


// var camelCaseName = Nameofband.charAt(0).toLowerCase() + Nameofband.slice(1);


// console.log("Camel case name:", camelCaseName);
// var legalvar2 = 45;


// console.log(legalvar2);
// var fname = "shahmeer"
// var Lstname = "  nadeem"



// var combname = fname + Lstname;
// console.log(combname);



// Examples of legal variable names:
// var myVariable;
// var _privateVar;
// var myVar2;


// var firstName;

// Examples of illegal variable names:
// var 123abc;
// var my variable;
// var if;

//CHAPTER 5://
// q1
// What is the name and symbol of the arithmetic operator that
// gives you the remainder when one number is divided by another?
// ANSWER IS MODULO OPERATOR. (abbreviated as mod).

// What is the value of num?


// var num = 20 % 6;
// console.log(num); //ANSWER IS 2;


// var largeNum = 1000 * 2000;

// console.log(largeNum);

// var a = 4;
// var b = a;
// var c = 2;
// var d = c;
// var res = b - d;


// console.log(res);


// const dividend = 10;


// const divisor = 3;
// const remainder = dividend % divisor;
// console.log(remainder);



// var a = 3;
// var b = 12;
// var c = a * b;
// alert(c);





// chapter 6

// q1

// var x = 5;
// x += 1;
// console.log("New value of x:", x);


// q2

// var x = 100;
// x -= 1;
// console.log("New value of x:", x);



// q4
// var y = 50;
// var z = --y;

// console.log("Value of y:", y);
// console.log("Value of z:", z);


// q5

// var num = 10;
// var newNum = num--;

// console.log("Value of num:", num);
// console.log("Value of newNum:", newNum);


// q6

// var num = 10;
// var newNum = num++;

// console.log("Value of num:", num);
// console.log("Value of newNum:", newNum);

// q7

// var num = 5;
// num++;
// alert("New value: " + num);


// chapter 07

// q1

// var calculatedNum = 2 + (2 * 6);
// console.log(calculatedNum)


// q2

// var calculatedNum = (2 + 2) * 6;

// console.log(calculatedNum)


// q3

// var calculatedNum = (2 + 2) * (4 + 2);

// console.log(calculatedNum)


// q4

// var calculatedNum = ((2 + 2) * 4) + 2;

// console.log(calculatedNum)

// q5

// var cost = (2 + (2 * 4) + 10);
// console.log(cost);

// q6

// var units = ((2 + 2) * 4) + 10;
// console.log("Units:", units);

// q7

// var pressure = (4 / 2) * 4;

// console.log(pressure);

// chapter08
// q1

// var num = "2" + "2";
// What is the value of num? Include quotation marks.

// q2
// var message = ("Hello," + "Dolly");
// alert(message);


// q3

// alert("33" + 3);


// q4
// var PAK = "Pakistan";
// var ZIN = "Zindabad";
// alert(PAK + ZIN);


// q5
// var hlo = "Hello" + 123;


// q6
// var a = "SHAH"
// var b = "MEER"
// var result = console.log(a+b)

// chapter 9
// var firstName = prompt("Enter First Name");

// var Country = prompt("Counrty?", "China")

// Correct this statement

// var yourName = prompt(Enter Your Name");

// var yourName = prompt("Enter Your Name");

// var str = prompt("Welcome", "Write something");

// var a = "Vini";
// var b = "jr";
// var c = prompt(a, b);



// var d = prompt("Enter a string");
// var e = d;
// console.log(e);


// var message = prompt("How are you?", "Good");
// alert(message);

// chapter 10

// q1

// var city = "Karachi"
// if (city = "Karachi") {
// console.log("The City OF Lights")
// }

// q2

// if (x === y) {

//     var x = "05"
//     var y = "06"

//     var z = "096"
// }
//     var z = prompt("Please enter the value of z:");

// q3

// if (ZipCode = "10010") {

//     var ZipCode = "10010"
//     var City = prompt("enter zipcode")
//     alert("Karachi");
//   } else {
//     alert("Please write correct city");
//   }

// q4


// if (x === 1) {
//   var  x = 10; 
// }
// else{
//     alert("value of x is 10")
// }


// Chapter 11 (Comparison Operators)


// 1. Code the first line of an if statement that tests whether one
// variable is unequal to another. (Use !)

// if (variable1 !== variable2) {
//     // Code to be executed if the condition is true
//   }

// 2. Code the first line of an if statement that tests whether the
// value represented by a variable is greater than or equal to the
// value represented by another variable.

// if (variable1 >= variable2) {}

// 3. Code an if statement. Test whether a variable is unequal to a
// particular number. If so, assign a number to that variable.

// if (variable !== 40) {
//     variable = 10; 
//   }

// Chapter 12 (if...else and else if statements)
// var a = +prompt("Enter Num");

// if (a <= 20) {
//     alert("if statment")
// } 
// else if(a <= 50)
// alert("else if statment")
// else {
//     alert("else statment")
// }

// 2. Write a program using if else and else if statement which take
// marks from user. And the program will calculate your percentage
// and give you grade A/C to Your percentage. (MARKSHEET)


// var marks = +prompt("Enter your marks:");


// var percentage = (marks / 100) * 100;


// var grade;

// if (percentage >= 90) {
//   grade = "A";
// } else if (percentage >= 80) {
//   grade = "B";
// } else if (percentage >= 70) {
//   grade = "C";
// } else if (percentage >= 60) {
//   grade = "D";
// } else {
//   grade = "F";
// }

// console.log("Percentage: " + percentage + "%");
// console.log("Grade: " + grade);

// 3. This is the if statement that begins the code.
// if (a === 10) {
// alert("a is 10");
// }
// If a isn't 10, display an alert that says The correct value of a is

// if (a === 10) {
//     alert("a is 10");
//     }
//     else{
//         alert("The correct value of a is 10");
//     }

// Chapter 13 (Testing sets of conditions)
// var a = 10;
// var b = 10;
// var c = 20;
// var d = 20;

// if (a === b && c === d) {
//    alert("True")
//   }

//   else{
//     alert("False")
//   }

// 2. Code the first line of an if statement that tests whether either or
// both are true: a has the same value as b or c doesn't have the
// same value as d.
// var a = 10;
// var b = 15;
// var c = 20;
// var d = 25;

// if (a === b || c !== d) {
//    alert("True")
//   }

//   else{
//     alert("False")
//   }

// 3. Code the first line of an if statement that tests whether
// I. name is either "Hamza" or "Arsalan".
// II. age is Less than 60.
// var name = prompt("Enter Name")

// if (name === "Hamza" || name === "Arsalan") {
//   alert("welcome "+ name);
// }
// var age = +prompt("Enter Age")

// if (age < 60) {
//   alert("Your Age is "+ age)
// }

// Chapter 14 (If statements nested)

// 1. Code an if statement enclosing a nested if. If password is not
// empty, then check if password is not greater than 5 , then display
// an alert that says "Password must be greater than 5" if greater
// than 5 then Alert "OK".

// if (password !== "") {
//   if (password.length <= 5) {
//     alert("Password must be greater than 5.");
//   } else {
//     alert("OK");
//   }
// }

// 2. Try this statement by yourself
// if (a === 1) {
// if (c === "Max") {
// alert("OK");
// }
// }

// var a = 1;

// if (a === 1) {
//   var c = "Max";
//   if (c === "Max") {
//   alert("OK");
//   }
//   }

// 4. Declare two variables and assign them the same number value.
// Test two conditions, using nested if statements. Test whether the
// first variable equals the second variable and also whether it is less
// than or equal to the second variable. If the test passes—and it
// will—display an alert message.

// var a1 = 5;
// var a2 = 5;

// if (a1 === a2) {
//   if (a1 <= a2) {
//     alert("The conditions passed!");
//   }
// }

// Chapter 15 (Array I)

// 1. Declare an empty array.

// var a = [];

// 2. Code an array with 1 string element
// var myArray = ["Hello"];

// 3. var alphabet = ["h","i","j","k"]. Now print the letter “j” in alert
// using array index

// var alphabet = ["h", "i", "j", "k"];
// alert(alphabet[2]); // Output: "j"

// 4. var alphabet=["h","i","j","k", “l”,”m”, “n”, “o”]. Find the total
// length of array.
// var alphabet = ["h", "i", "j", "k", "l", "m", "n", "o"];
// var length = alphabet.length;
// alert(length); // Output: 8

// Chapter 16 (Array II)

// 1. Code an array with 1 string element.
// Add an additional element to the array using push.

// var arr = ["string"];
// arr.push("string2");
// alert(arr);

// 2. var Alphabet=["h","i","j","k"]
// Remove the last element from the array Alphabet.

// var Alphabet = ["h", "i", "j", "k"];
// Alphabet.pop();

// 3. var Alphabet=["h","i","j","k"]
// Add a new element, a number, to the end of an array.
// var Alphabet = ["h", "i", "j", "k"];
// Alphabet.push(5);

// Chapter 16 (Array III)
// 1. var sizes = ["S", "M", "XL", "XXL", "XXXL"].
// Remove the first element of an array.

// var sizes = ["S", "M", "XL", "XXL", "XXXL"];
// sizes.shift();

// 2. var sizes = ["S", "M", "XL", "XXL", "XXXL"].
// Add three number elements to the beginning of an array.
  
// var sizes = ["S", "M", "XL", "XXL", "XXXL"];
// sizes.unshift(1, 2, 3);

// 3. Declare an array with one element.
// Add a second element to the beginning of the array.
// Create an alert whose message is the new first element.

// var arr = [1];
// arr.unshift(2);
// alert(arr[0]);

// 4. var sizes = ["S", "M", "XL", "XXL", "XXXL"].
// Insert "L" into the array between "M" and "XL".
// var sizes = ["S", "M", "XL", "XXL", "XXXL"];
// sizes.splice(2, 0, "L");

// Chapter 17 - 20 (for Loops)

// 1. Write a statement in which loop is to run 10 times.

// for (var i = 0; i <=9; i++) {
//   console.log(i) //Output is 10
  
// }

// 2. Code the first line of a for loop with the usual counter name, usual
// starting value, and usual increment. Run it 12 times using <= to
// specify how many loops.
// for (var i = 0; i <=11; i++) {
//   console.log(i) //Output is 12
  
// }

// 3. What are the 5 characters missing from this code, excluding any
// spaces that are missing? Type them in order, with no spaces or
// commas between them. 
// for var i = 0 i <= 4 i++

// for (var i = 0; i <= 4; i++){

// }

// 5. Code the first line of a for loop with the usual counter and the
// usual starting value. Run it 3 times using > to specify how many
// loops. Decrement it with each iteration.

// for (var  i = 3; i > 0; i--) {

//   console.log(i);
// }