How to harness the power of JavaScript Switch statements for efficient decision-making

JavaScript Switch statements are essential tools for creating structured decision-making in your code. They allow you to simplify complex conditional logic, making your code more organized and easier to understand. In this comprehensive guide, we will dive deep into JavaScript Switch statements, providing detailed explanations and practical real-world examples to help you become proficient in using them effectively.

1. Understanding the Role of Switch Statements

JavaScript Switch statements are a powerful alternative to long chains of if-else statements. They allow you to compare a value against multiple cases and execute code based on the matching case.

2. The Basic Switch Statement

Learn how to use the basic switch statement to compare a single value against multiple cases and execute code based on the matching case.

Example:

let dayOfWeek = "Tuesday";
switch (dayOfWeek) {
    case "Monday":
        console.log("It's the start of the week.");
        break;
    case "Tuesday":
        console.log("It's Tuesday!");
        break;
    default:
        console.log("It's another day.");
}

let fruit = "apple";
switch (fruit) {
    case "apple":
    case "banana":
    case "pear":
        console.log("It's a common fruit.");
        break;
    case "kiwi":
    case "pineapple":
        console.log("It's a tropical fruit.");
        break;
    default:
        console.log("It's not a recognized fruit.");
}

let month = 2;
switch (month) {
    case 1:
        console.log("January");
        break;
    case 2:
        console.log("February");
        break;
    default:
        console.log("Other month");
}

let score = 85;
switch (true) {
    case score >= 90:
        console.log("A");
        break;
    case score >= 80:
        console.log("B");
        break;
    default:
        console.log("C or below");
}