# Switch Case in Javascript

In JavaScript, the `switch` statement is used to perform different actions based on different conditions. It evaluates an expression and then executes statements associated with the matching case label. Here's a basic syntax of the `switch` statement:

```javascript
javascriptCopy codeswitch (expression) {
  case value1:
    // Code to be executed if expression matches value1
    break;
  case value2:
    // Code to be executed if expression matches value2
    break;
  // Add more cases as needed...
  default:
    // Code to be executed if expression doesn't match any case
}
```

* `expression`: The expression whose value is to be compared with the values of the case labels.
    
* `case valueN`: The value to compare with `expression`. If `expression` matches `valueN`, the code within the corresponding `case` block is executed.
    
* `break`: Optional. It terminates the `switch` statement. If omitted, execution will continue to the next case block. If `break` is not used, all the code blocks after the matched case will be executed.
    
* `default`: Optional. It specifies the code to be executed if none of the case values match the expression.
    

Here's an example of how you can use the [Switch statement in JavaScript](https://www.almabetter.com/bytes/tutorials/javascript/switch-case-in-javascript):

```javascript
javascriptCopy codelet day = new Date().getDay();
let dayName;

switch (day) {
  case 0:
    dayName = "Sunday";
    break;
  case 1:
    dayName = "Monday";
    break;
  case 2:
    dayName = "Tuesday";
    break;
  case 3:
    dayName = "Wednesday";
    break;
  case 4:
    dayName = "Thursday";
    break;
  case 5:
    dayName = "Friday";
    break;
  case 6:
    dayName = "Saturday";
    break;
  default:
    dayName = "Invalid Day";
}

console.log("Today is " + dayName);
```

This code snippet uses the `switch` statement to determine the day of the week based on the current day number (`getDay()` returns a number from 0 to 6 representing the day of the week, starting from Sunday as 0). It assigns the corresponding day name to the `dayName` variable and logs it to the console. Learn more [free JavaScript tutorials](https://www.almabetter.com/bytes/tutorials/javascript)!