

Untitled Lesson
Presentation
•
Computers
•
KG
•
Hard
NAZATUL KHALEEDA BINTI JAMARI
FREE Resource
4 Slides • 0 Questions
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Pemboleh ubah adalah ruang dalam memori yang digunakan untuk menyimpan nilai yang boleh berubah-ubah semasa atur cara dijalankan. Setiap pemboleh ubah mempunyai nama unik dan jenis data yang tertentu.
Pemboleh Ubah
Pemalar adalah ruang dalam memori yang digunakan untuk menyimpan nilai yang tetap dan tidak berubah semasa atur cara dijalankan. Pemalar biasanya digunakan untuk nilai yang tidak akan berubah seperti π (pi), g (graviti), dan lain-lain.
Pemalar
3
Perubahan Nilai: Nilai pemalar tidak boleh diubah setelah ia diisytiharkan dan diberi nilai.
Contoh:
final float PI = 3.14159;
// PI tidak boleh diubah selepas ini
Pemalar
Perubahan Nilai: Nilai pemboleh ubah boleh diubah pada bila-bila masa semasa program berjalan.
Contoh:
int umur = 25;
umur = 26; // Nilai umur berubah menjadi 26
Pemboleh Ubah
Perbezaan
4
DATA | Penerangan | Contoh |
|---|---|---|
INTEGER | data yang menyimpan nombor bulat | 1, -20, 150 |
Titik Terapung | data yang menyimpan nombor perpuluhan | 3.14, -0.001, 2.71828 |
Karakter | data yang menyimpan satu aksara | 'A', 'b', '7' |
String | data yang menyimpan rangkaian aksara | "Hello World", "Kuala Lumpur", "12345" |
Boolean | data yang menyimpan nilai benar atau palsu | true, false |
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