Switch Case Statement

Switch case statements are an efficient way to execute different blocks of code based on various conditions. It's like a more structured and readable if-else.

Basic Syntax

switch (expression) {
  case value1:
    // kode untuk value1
    break;
  case value2:
    // kode untuk value2
    break;
  // tambahkan lebih banyak case sesuai kebutuhan
  default:
    // kode jika tidak ada case yang cocok
}

How it Works

• Expression is evaluated once.
• The value of the expression is compared for each case.
• If there is a match, the code block in that case is executed.
• Break is used to stop execution after finding a match.
• Default is optional and will be executed if no case matches.

Practical Example
Suppose we want to provide different messages based on the value of a variable day:

let day = 3;
let dayName;

switch (day) {
  case 1:
    dayName = "Senin";
    break;
  case 2:
    dayName = "Selasa";
    break;
  case 3:
    dayName = "Rabu";
    break;
  case 4:
    dayName = "Kamis";
    break;
  case 5:
    dayName = "Jumat";
    break;
  case 6:
    dayName = "Sabtu";
    break;
  case 7:
    dayName = "Minggu";
    break;
  default:
    dayName = "Hari tidak valid";
}

console.log(dayName); // Output: Rabu

Tips

• Use switch case when there are many conditions that need to be checked.
• Don't forget to add a break to prevent execution from continuing to the next case.
• Default is useful for handling unexpected values.

Switch case makes the code cleaner and easier to understand compared to long if-elses. Try it in your projects and see the difference!

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