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PERULANGAN
OLEH : AKHI HARUNI
Mengapa diciptakan algoritma perulangan?
Ketika kamu akan menampilkan motivasi diri “SAYA BISA”
sebanyak 1000 kali, mungkinkah kamu menuliskannya
sebanyak 1000 kali juga?
Jawabannya adalah MUNGKIN, namun TIDAK EFISIEN
KODE PROGRAM. Oleh karena itu, untuk meringkas kode
program kita, diciptakanlah algoritma perulangan.
Perulangan FOR
 Ada banyak macam algoritma perulangan. Untuk saat ini akan dijelaskan perulangan FOR
 Struktur dasar :
batasAwal merupakan batas awal perulangan
batasAkhir merupakan batas akhir perulangan (mau diulang berapa kali? Dihitung dari batas awal)
Increment/decrement merupakan penambahan atau pengurangan
Contoh
Tampilkan warna favoritmu sebanyak 7 kali dengan batas awal 0! Maka sintaknya…
Penjelasan KODE PROGRAM
 int a merupakan deklarasi variabel untuk for. Jika tidak ada deklarasi tersebut, maka program
akan error dengan tulisan a was not declared in this scope. Alternatif lain adalah
memasukkannya langsung ke dalam sintak FOR menjadi for (int a = 0; a ……
 a = 0 berarti batas awal perulangan adalah 0. Batas tersebut nantinya digunakan sebagai
patokan. a < 7 berarti batas akhirnya adalah kurang dari 7 (atau bisa kita sebut 6) sehingga
jumlah pernyataan yang akan tampil sebanyak : 0, 1, 2, 3, 4, 5, 6 (7 kali)
 a++ berarti setiap proses selesai dilakukan, maka akan ada penambahan 1 pada variabel a,
maksudnya seperti ini :
 a = 0, apakah a kurang dari 7? Ya, maka tambahkan 1 pada a (a++) kemudian tampilkan pernyataan
 a = 1, apakah a kurang dari 7? Ya, maka tambahkan 1 pada a (a++) kemudian tampilkan pernyataan
 a = 2 ……dan seterusnya sampai a < 7
Bagaimana dengan bilangan kelipatan?
Bagaimana dengan bilangan ganjil genap?

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PERULANGAN ALGORITMA

  • 2. Mengapa diciptakan algoritma perulangan? Ketika kamu akan menampilkan motivasi diri “SAYA BISA” sebanyak 1000 kali, mungkinkah kamu menuliskannya sebanyak 1000 kali juga? Jawabannya adalah MUNGKIN, namun TIDAK EFISIEN KODE PROGRAM. Oleh karena itu, untuk meringkas kode program kita, diciptakanlah algoritma perulangan.
  • 3. Perulangan FOR  Ada banyak macam algoritma perulangan. Untuk saat ini akan dijelaskan perulangan FOR  Struktur dasar : batasAwal merupakan batas awal perulangan batasAkhir merupakan batas akhir perulangan (mau diulang berapa kali? Dihitung dari batas awal) Increment/decrement merupakan penambahan atau pengurangan
  • 4. Contoh Tampilkan warna favoritmu sebanyak 7 kali dengan batas awal 0! Maka sintaknya…
  • 5. Penjelasan KODE PROGRAM  int a merupakan deklarasi variabel untuk for. Jika tidak ada deklarasi tersebut, maka program akan error dengan tulisan a was not declared in this scope. Alternatif lain adalah memasukkannya langsung ke dalam sintak FOR menjadi for (int a = 0; a ……  a = 0 berarti batas awal perulangan adalah 0. Batas tersebut nantinya digunakan sebagai patokan. a < 7 berarti batas akhirnya adalah kurang dari 7 (atau bisa kita sebut 6) sehingga jumlah pernyataan yang akan tampil sebanyak : 0, 1, 2, 3, 4, 5, 6 (7 kali)  a++ berarti setiap proses selesai dilakukan, maka akan ada penambahan 1 pada variabel a, maksudnya seperti ini :  a = 0, apakah a kurang dari 7? Ya, maka tambahkan 1 pada a (a++) kemudian tampilkan pernyataan  a = 1, apakah a kurang dari 7? Ya, maka tambahkan 1 pada a (a++) kemudian tampilkan pernyataan  a = 2 ……dan seterusnya sampai a < 7