Today I Learned: Conditional Statements in JavaScript

JavaScript is one of the most widely used programming languages, and today I took my first steps into a key concept: conditional statements. These are used to perform different actions based on different conditions.

🧩 What Are Conditional Statements?

Conditional statements allow a program to make decisions. You can think of them like “if this happens, do that.”

In JavaScript, the most common conditional statements are:

• if
• else if
• else
• switch

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✅ if Statement

The if statement checks a condition. If it’s true, it runs a block of code.

let age = 18;

if (age >= 18) {
  console.log("You are an adult.");
}

📝 Output: You are an adult.

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🔄 else if and else

When you have more than one condition, you can use else if and else.

let time = 14;

if (time < 12) {
  console.log("Good morning!");
} else if (time < 18) {
  console.log("Good afternoon!");
} else {
  console.log("Good evening!");
}

📝 Output: Good afternoon!

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🔁 switch Statement

The switch statement is useful when you have many conditions based on the same variable.

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("Another day");
}

📝 Output: Wednesday

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💡 TIL Summary

• Conditional statements control the flow of logic.
• Use if for one condition, else if for multiple, and else for a fallback.
• Use switch when checking the same variable for different values.

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