<!DOCTYPE html>
<html>
<body>
<h2>if Statement</h2>
<script>
let age = 18;
if (age >= 18) {
console.log("You are an adult.");
} else {
console.log("You are a minor.");
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<body>
<h2> if...else Statement</h2>
<script>
let score = 75;
if (score >= 50) {
console.log("You passed the exam.");
} else {
console.log("You failed the exam.");
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<body>
<h2> if...else if...else Statement</h2>
<script>
let marks = 85;
if (marks >= 90) {
console.log("Grade: A");
} else if (marks >= 75) {
console.log("Grade: B");
} else {
console.log("Grade: C");
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<body>
<h2> switch Statement</h2>
<script>
let day = 3;
switch (day) {
case 1:
console.log("Monday");
break;
case 2:
console.log("Tuesday");
break;
case 3:
console.log("Wednesday");
break;
default:
console.log("Not a valid day.");
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<body>
<h2> Ternary Operator</h2>
<script>
let isRaining = false;
let message = isRaining ? "Take an umbrella." : "No need for an umbrella.";
console.log(message); // Output: "No need for an umbrella."
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<body>
<h2> Short-Circuit Evaluation</h2>
<script>
let x = 5;
let result = (x > 0) && (x < 10);
console.log(result); // Output: true
</script>
</body>
</html>