programs.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>Document</title>
	</head>
	<body>
		<script>
			//🟨1. Creating Boolean Variables:

			let isTrue = true
			let isFalse = false
			console.log(isTrue)
			console.log(isFalse)

			//🟨2. Boolean Expressions:

			let age = 18
			let isAdult = age >= 18
			console.log(isAdult)

			//🟨3. Comparison Operators:

			let x = 5
			let y = 10

			let isEqual = x === y
			let isNotEqual = x !== y
			let isGreater = x > y
			let isLess = x < y

			console.log(isEqual)
			console.log(isNotEqual)
			console.log(isGreater)
			console.log(isLess)

			//🟨4. Logical Operators (AND, OR):

			var hasPermission = true
			var isLoggedIn = false

			letAccessResource = hasPermission && isLoggedIn
			letSeeContent = hasPermission || isLoggedIn

			console.log(letAccessResource)
			console.log(letSeeContent)

			//🟨5. Negation Operator (NOT):

			var isLoggedOut = !isLoggedIn
			console.log(isLoggedOut)

			//🟨6. Using Boolean Values in Conditional Statements:

			var isRaining = false
			if (isRaining) {
				console.log("Take an umbrella")
			} else {
				console.log("No need for an umbrella")
			}

			//🟨7. Converting Values to Booleans:~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

			var value1 = Boolean(0)
			var value2 = Boolean("")
			var value3 = Boolean(null)
			var value4 = Boolean("Hello")

			console.log(value1)
			console.log(value2)
			console.log(value3)
			console.log(value4)

			//🟨8. Using Booleans with If-Else Statements:

			var isSunny = true

			if (isSunny) {
				console.log(isSunny + " It's a sunny day!")
			} else {
				console.log(isSunny + " It's not a sunny day! ")
			}

			//🟨9. Checking for Empty Strings:

			let username = ""
			if (username) {
				console.log(`Hello ${username}`)
			} else {
				console.log("Please enter your username !")
			}

			//🟨10. Checking if a Number is Even:

			let number = 9
			let isEven = number % 2 === 0

			if (isEven) {
				console.log(`${number} is Even`)
			} else {
				console.log(`${number} is Odd`)
			}

			//🟨11. Using Ternary Operator:

			let userName = "deep"
			let isAuthenticated = true

			var message = isAuthenticated ? `Welcome ${userName}` : "Acess Denied!"

			console.log(message)

			//🟨12. Checking for Multiple Conditions:

			let isMorning = true
			let isWeekend = false

			if (isMorning && !isWeekend) {
				console.log("It's a weekend morning")
			} else {
				console.log("It's either not mornign or it's the weekend.")
			}

			//🟨13. Using Boolean Functions:

			function isLeapYear(year) {
				return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0
			}

			var year = 2025
			let leapYear = isLeapYear(year)

			if (leapYear) {
				console.log(`${year} is leap year`)
			} else {
				console.log(`${year} is not a leap year`)
			}

			//🟨14. Comparing Strings:

			let color1 = "blue"
			let color2 = "red"
			let areColorSame = color1 === color2
			if (areColorSame) {
				console.log(`${color1} and ${color2} is Same`)
			} else {
				console.log(`${color1} and ${color2} are not Same`)
			}

			//🟨15. Checking if a Year is a Century Year:

			function isCentureYear(year) {
				return year % 100 === 0
			}

			var year = 2110
			var isCentury = isCentureYear(year)

			if (isCentury) {
				console.log(`${year} is a century year`)
			} else {
				console.log(`${year} is not a century year`)
			}

			//🟨16. Using Logical OR to Provide Default Values:

			function greetUser(username) {
				username = username || "Guest"
				console.log(`Hello, ${username}`)
			}

			greetUser("deep")
			greetUser()

			//🟨17. Checking if an Array is Empty:

			let fruits = []

			if (fruits.length === 0) {
				console.log("The array is empty")
			} else {
				console.log("The array is not empty")
			}

			//🟨18. Checking if a Password Meets Criteria: >=8 char, >=1 Uppercase, >=1 digit

			let password = "abc123"
			let isStrongPassword = password.length >= 8 && /[A-Z]/.test(password) && /\d/.test(password)

			if (isStrongPassword) {
				console.log(`${password} is Srtong`)
			} else {
				console.log(`Password : "${password}" is Weak`)
			}

			//🟨19. Using Logical NOT for Validation:

			function isValidInput(input) {
				return !!input // 🟩Double negation converts the input to a Boolean
			}

			let userInput = "Hello"
			if (isValidInput(userInput)) {
				console.log(`User Input : "${userInput}" is Valid`)
			} else {
				console.log(`User Input : "${useInput}" is not valid`)
			}

			//🟨20. Checking if a Character is a Vowel:

			function isVowel(char) {
				char = char.toLowerCase()
				return "aeiou".includes(char)
			}

			let letter = "a"
			if (isVowel(letter)) {
				console.log(`Letter : "${letter}" is Vovel`)
			} else {
				console.log(`Letter : "${letter}" is not a Vovel`)
			}

			//🟨21. Checking if a Number is Positive or Negative:

			function isPositive(num) {
				return num >= 0
			}

			var num = -5
			if (isPositive(num)) {
				console.log(`Number : '${num}' is Positive`)
			} else {
				console.log(`Number : '${num}' is Negative`)
			}

			//🟨22. Checking if a String Contains a Substring:

			let sentence = "Deep Kothari"
			let subString = "Deep"
			if (sentence.includes(subString)) {
				console.log(`subString : '${subString}' is present in sentence '${sentence}'`)
			} else {
				console.log(`subString : '${subString}' is not present in sentence '${sentence}'`)
			}

			//🟨23. Using the && Operator with Multiple Conditions:

			var isSunny = true
			var isWarm = true
			if (isSunny && isWarm) {
				console.log("It's sunny and warm outside!")
			} else {
				console.log("It's not sunny and warm outside")
			}

			//🟨24. Checking if a User Has Admin Rights:

			let isAdmin = true
			let canEdit = false
			if (isAdmin || canEdit) {
				console.log("The user can edit content")
			} else {
				console.log("The user can not edit content")
			}

			//🟨25. Using the ! Operator to Toggle a Boolean:

			let isActive = false
			// isActive = !isActive
			// console.log("Active status : ",isActive)
			// OR
			if (isActive) {
				console.log("User is active")
			} else {
				console.log("User is not active")
			}

			//🟨26. Using Conditional (Ternary) Operator for Simplified Code:

			let isLogged = true
			var message = isLogged ? "Welcome!" : "Please log in."
			console.log(message)
		</script>
	</body>
</html>