# Control Statements

Control statements are used to control the flow of execution of a program based on certain conditions.

- **Decision-making** — Programs can choose different actions based on input or situations (e.g., if a user is logged in, show the dashboard).
- **Control program flow** — They determine which block of code should execute.
- **Handle different situations** — They allow programs to respond differently depending on the conditions.

# Conditional Statements

Very often, when writing code, you want to perform different actions based on different decisions. You can use conditional statements to achieve this.

## 1️⃣ If statement

The `if` statement executes a block of code only if a specified condition is true.

```js
// Syntax
if (condition) {
    // Code to be executed if condition is true
}

// Example
if (time < 10) {
    document.write("<b>Good morning</b>");
}
```

## 2️⃣ If...else statement

The `if...else` statement executes one block of code if the condition is true and another block if the condition is false.

```js
// Syntax
if (condition) {
    // Code to be executed if condition is true
} else {
    // Code to be executed if condition is false
}

// Example
if (time < 10) {
    document.write("Good morning!");
} else {
    document.write("Good day!");
}
```

## 3️⃣ Switch statement

The `switch` statement is used to select and execute one block of code from multiple possible options based on an expression.

```js
// Syntax
switch (expression) {
    case label1:
        // Execute code block 1
        break;

    case label2:
        // Execute code block 2
        break;

    default:
        // Code to execute if no case matches
}
```

**Example:**

```js
switch (theDay) {
    case 5:
        document.write("Finally Friday");
        break;

    case 6:
        document.write("Super Saturday");
        break;

    case 0:
        document.write("Sleepy Sunday");
        break;

    default:
        document.write("I'm looking forward to this weekend!");
}
```

> **Note** 
> 
> - `case` specifies a possible value to match.
> - `break` terminates the switch statement and prevents execution from continuing into the next case.
> - `default` executes when none of the cases match.