Here are the JavaScript programs
51. JavaScript Program to Print Numbers from 10 to 20 Using For Loop:
for (let i = 10; i <= 20; i++) {
console.log(i);
}
52. JavaScript Program to Calculate Multiplication and Division of Two Numbers (Input from User):
let num1 = parseFloat(prompt("Enter first number:"));
let num2 = parseFloat(prompt("Enter second number:"));
let multiplication = num1 * num2;
let division = num1 / num2;
console.log(`Multiplication: ${multiplication}`);
console.log(`Division: ${division}`);
53. JavaScript Program to Validate User Accounts for Multiple Set of User ID and Password:
let users = [
{ username: 'user1', password: 'pass1' },
{ username: 'user2', password: 'pass2' },
{ username: 'user3', password: 'pass3' }
];
function validateAccount(username, password) {
let user = users.find(u => u.username === username && u.password === password);
return user ? 'Login successful!' : 'Invalid username or password.';
}
console.log(validateAccount('user2', 'pass2')); // Example usage
54. JavaScript Program to Remove HTML/XML Tags from String:
function removeHTMLTags(str) {
return str.replace(/<[^>]*>/g, '');
}
console.log(removeHTMLTags("<div>Hello, <b>world</b>!</div>")); // Example usage
55. JavaScript Program to Find the Second Largest Number in an Array:
function findSecondLargest(arr) {
let uniqueArr = [...new Set(arr)].sort((a, b) => a - b);
return uniqueArr[uniqueArr.length - 2];
}
console.log(findSecondLargest([1, 3, 4, 2, 3, 5])); // Example usage
56. JavaScript Program to Generate Fibonacci Series Using Loop:
function fibonacci(n) {
let fib = [0, 1];
for (let i = 2; i < n; i++) {
fib.push(fib[i - 1] + fib[i - 2]);
}
return fib;
}
console.log(fibonacci(10)); // Example usage
57. JavaScript Program to Demonstrate Various Mouse Events with Output:
document.getElementById("myDiv").addEventListener("click", function() {
console.log("Mouse clicked!");
});
document.getElementById("myDiv").addEventListener("mouseover", function() {
console.log("Mouse over the div!");
});
58. JavaScript Program to Print Numbers from 1 to 20:
for (let i = 1; i <= 20; i++) {
console.log(i);
}
59. JavaScript Program to Reverse a String Using For Loop:
function reverseString(str) {
let reversed = '';
for (let i = str.length - 1; i >= 0; i--) {
reversed += str[i];
}
return reversed;
}
console.log(reverseString("hello")); // Example usage
60. JavaScript Program to Print Current Date and Time:
function displayDateTime() {
let currentDate = new Date();
console.log(currentDate.toLocaleString());
}
displayDateTime(); // Example usage
61. JavaScript Program to Create Table with Two Columns Using Switch Statement:
function createTable(rows) {
let table = "<table>";
for (let i = 1; i <= rows; i++) {
table += `<tr><td>Row ${i}</td><td>Data ${i}</td></tr>`;
}
table += "</table>";
return table;
}
document.getElementById("table").innerHTML = createTable(5); // Example usage
62. JavaScript Program to Check if a Number is Prime or Not:
function isPrime(num) {
if (num <= 1) return false;
for (let i = 2; i <= Math.sqrt(num); i++) {
if (num % i === 0) return false;
}
return true;
}
console.log(isPrime(7)); // Example usage
63. JavaScript Program to Print Numbers from 10 to 20 Using For Loop (Again):
// Same as program 51
64. JavaScript Program to Demonstrate Multiplication Table:
function multiplicationTable(num) {
for (let i = 1; i <= 10; i++) {
console.log(`${num} x ${i} = ${num * i}`);
}
}
multiplicationTable(5); // Example usage
65. JavaScript Program to Sum 3 and 5 Multiples Under 1000:
let sum = 0;
for (let i = 1; i < 1000; i++) {
if (i % 3 === 0 || i % 5 === 0) {
sum += i;
}
}
console.log(sum);
66. JavaScript Program to Display Even Numbers from 25 to 50:
for (let i = 25; i <= 50; i++) {
if (i % 2 === 0) {
console.log(i);
}
}
67. JavaScript Program to Perform Basic Arithmetic Operations:
function basicArithmetic(num1, num2) {
console.log(`Addition: ${num1 + num2}`);
console.log(`Subtraction: ${num1 - num2}`);
console.log(`Multiplication: ${num1 * num2}`);
console.log(`Division: ${num1 / num2}`);
}
basicArithmetic(10, 5); // Example usage
68. JavaScript Program to Calculate the Factorial of a Given Number:
function factorial(n) {
let result = 1;
for (let i = 1; i <= n; i++) {
result *= i;
}
return result;
}
console.log(factorial(5)); // Example usage
69. JavaScript Program to Accept Two Numbers and Perform Addition of Two Numbers:
let num1 = parseFloat(prompt("Enter first number:"));
let num2 = parseFloat(prompt("Enter second number:"));
let sum = num1 + num2;
console.log(`Sum: ${sum}`);
70. JavaScript Program to Develop a Digital Clock to Display the Time and Set the Timer:
function startClock() {
setInterval(() => {
let time = new Date();
let hours = time.getHours();
let minutes = time.getMinutes();
let seconds = time.getSeconds();
let currentTime = `${hours}:${minutes}:${seconds}`;
console.log(currentTime);
}, 1000);
}
startClock(); // Example usage
71. JavaScript Program to Reverse a String:
function reverseString(str) {
return str.split('').reverse().join('');
}
console.log(reverseString("hello")); // Example usage
72. JavaScript Program to Display the Current Date and Time (Again):
// Same as program 60
73. JavaScript Program to Calculate Volume of a Sphere:
function volumeOfSphere(radius) {
return (4 / 3) * Math.PI * Math.pow(radius, 3);
}
console.log(volumeOfSphere(5)); // Example usage
74. JavaScript Program to Reverse a Number:
function reverseNumber(num) {
let reversed = 0;
while (num !== 0) {
reversed = reversed * 10 + (num % 10);
num = Math.floor(num / 10);
}
return reversed;
}
console.log(reverseNumber(12345)); // Example usage
75. JavaScript Program to Add Items in a Blank Array and Display the Items:
let arr = [];
arr.push(10);
arr.push(20);
arr.push(30);
console.log(arr);
76. JavaScript Program to Swap Pairs of Adjacent Digits of a Given Integer of Even Length:
function swapAdjacentDigits(num) {
let numStr = num.toString();
let swapped = '';
for (let i = 0; i < numStr.length; i += 2) {
swapped += numStr[i + 1] + numStr[i];
}
return swapped;
}
console.log(swapAdjacentDigits(123456)); // Example usage
77. JavaScript Program to Explain the Different Ways for Displaying Output:
// Using console.log()
console.log("Hello, world!");
// Using alert()
alert("This is an alert!");
// Using document.write()
document.write("This is written directly on the page.");
78. JavaScript Program to Sort an Array in Ascending Order:
let arr = [5, 3, 8, 1, 2];
arr.sort((a, b) => a - b);
console.log(arr);
79. JavaScript Program to Display the Greatest Number Among Three Numbers:
function greatestNumber(a, b, c) {
return Math.max(a, b, c);
}
console.log(greatestNumber(5, 10, 7)); // Example usage
``
`
80. JavaScript Program to Validate Email ID of the User Using Regular Expression:
function validateEmail(email) {
const regex = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,6}$/;
return regex.test(email);
}
console.log(validateEmail("test@example.com")); // Example usage
81. JavaScript Program for Addition of Two Numbers:
function addNumbers(a, b) {
return a + b;
}
console.log(addNumbers(5, 10)); // Example usage
82. JavaScript Program to Get the Integers in Range (x, y):
function getRange(x, y) {
let range = [];
for (let i = x; i <= y; i++) {
range.push(i);
}
return range;
}
console.log(getRange(5, 10)); // Example usage
83. JavaScript Program to Implement JavaScript Object Concept:
let person = {
name: "John",
age: 30,
greet() {
console.log(`Hello, my name is ${this.name} and I'm ${this.age} years old.`);
}
};
person.greet();
84. JavaScript Program to Change the Background Color After Clicking "Change Color" Button:
document.getElementById("changeColorBtn").addEventListener("click", function() {
document.body.style.backgroundColor = "lightblue";
});
85. JavaScript Program to Remove Duplicate Items from an Array:
let arr = [1, 2, 3, 4, 1, 5, 2];
let uniqueArr = [...new Set(arr)];
console.log(uniqueArr);
86. JavaScript Program to Remove Duplicate Items from an Array Ignoring Case Sensitivity:
let arr = ['apple', 'banana', 'Apple', 'Banana'];
let uniqueArr = [...new Set(arr.map(item => item.toLowerCase()))];
console.log(uniqueArr);
87. JavaScript Program to Accept String and Calculate Its Length:
let str = prompt("Enter a string:");
console.log(`Length of the string is: ${str.length}`);
88. JavaScript Program to Find the Area of a Rectangle:
function areaOfRectangle(length, width) {
return length * width;
}
console.log(areaOfRectangle(5, 10)); // Example usage
89. JavaScript Program to Print First n Odd Numbers Divisible by 7:
function oddNumbersDivisibleBy7(n) {
let count = 0;
let num = 1;
while (count < n) {
if (num % 2 !== 0 && num % 7 === 0) {
console.log(num);
count++;
}
num++;
}
}
oddNumbersDivisibleBy7(5); // Example usage
90. JavaScript Program to Accept a Number from User and Check Whether It Is Armstrong or Not:
function isArmstrong(num) {
let numStr = num.toString();
let length = numStr.length;
let sum = 0;
for (let i = 0; i < length; i++) {
sum += Math.pow(parseInt(numStr[i]), length);
}
return sum === num;
}
console.log(isArmstrong(153)); // Example usage
91. JavaScript Program to Calculate Simple Interest:
function calculateSimpleInterest(principal, rate, time) {
return (principal * rate * time) / 100;
}
console.log(calculateSimpleInterest(1000, 5, 2)); // Example usage
92. JavaScript Program Using If-Else Statement to Check if a Given Number is Even or Odd:
let num = parseInt(prompt("Enter a number:"));
if (num % 2 === 0) {
console.log("Even");
} else {
console.log("Odd");
}
93. JavaScript Program to Convert Dollar to Rupee:
function convertDollarToRupee(dollar) {
const rate = 74.5; // Example rate of 1 USD = 74.5 INR
return dollar * rate;
}
console.log(convertDollarToRupee(10)); // Example usage
94. JavaScript Program to Swap Two Numbers Using Functions:
function swapNumbers(a, b) {
let temp = a;
a = b;
b = temp;
return [a, b];
}
console.log(swapNumbers(5, 10)); // Example usage
95. JavaScript Program to Find the Area of a Circle:
function areaOfCircle(radius) {
return Math.PI * radius * radius;
}
console.log(areaOfCircle(5)); // Example usage
96. JavaScript Program to Add Two Numbers Using Function:
function addTwoNumbers(a, b) {
return a + b;
}
console.log(addTwoNumbers(5, 10)); // Example usage
97. JavaScript Program to Make a Simple Calculator:
function calculator(a, b, operator) {
switch (operator) {
case "+":
return a + b;
case "-":
return a - b;
case "*":
return a * b;
case "/":
return a / b;
default:
return "Invalid operator!";
}
}
console.log(calculator(10, 5, "+")); // Example usage
98. JavaScript Program to Set the Background Color of a Paragraph:
document.getElementById("myParagraph").style.backgroundColor = "yellow";
99. JavaScript Program to Check if a Number is Prime or Not (Again):
// Same as program 62
100. JavaScript Program to Find Factorial of a Number in HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Factorial of a Number</title>
</head>
<body>
<script>
function factorial(n) {
let result = 1;
for (let i = 1; i <= n; i++) {
result *= i;
}
return result;
}
alert(factorial(5));
</script>
</body>
</html>
These are JavaScript programs, you can use and modify them as needed for different purposes!
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