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Mencari Nilai dan Jumlah Suku Barisan Geometri dengan Java
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import java.io.BufferedReader; | |
import java.io.IOException; | |
import java.io.InputStreamReader; | |
/** | |
* @Developer : Erik Gunawan | |
* @Nickname : EXz | |
* @Phone : 0896 5332 0577 | |
* @EMail : admin@erikgunawan.com | |
* @Gmail : erik.gunawan44@gmail.com | |
* @Website : www.erikgunawan.com | |
* @Facebook : facebook.com/revolutionist.exz | |
* @Twitter : twitter.com/_EXz | |
*/ | |
public class BarisanDeretGeometri { | |
private static BufferedReader br = null; | |
public static void main(String[] args) { | |
System.out.println("=================================="); | |
System.out.println("Program Barisan dan Deret Geometri"); | |
System.out.println("=================================="); | |
System.out.println(); | |
boolean cek = true; | |
while (cek) { | |
br = new BufferedReader(new InputStreamReader(System.in)); | |
try { | |
System.out.print("Masukkan suku pertama (a) : "); | |
int a = Integer.parseInt(br.readLine()); | |
System.out.print("Masukkan rasio (r) : "); | |
int r = Integer.parseInt(br.readLine()); | |
System.out.print("Masukkan banyak suku (n) : "); | |
int n = Integer.parseInt(br.readLine()); | |
System.out.println(); | |
int rn = 1; | |
int i = n; | |
while (i>0) { | |
rn *= r; | |
i--; | |
} | |
int Un = a * rn / r; | |
System.out.println("Nilai suku ke-" + n + " (U" + n + ") adalah : " + Un); | |
int Sn = a * (rn-1) / (r-1); | |
System.out.println("Jumlah " + n + " suku pertama (S" + n +") adalah : " + Sn); | |
System.out.println(); | |
System.out.print("Ingin coba lagi (Y/N) ? "); | |
String coba = br.readLine(); | |
if (coba.equalsIgnoreCase("N")) | |
cek = false; | |
else if (coba.equalsIgnoreCase("Y")) | |
cek = true; | |
else | |
System.exit(0); | |
} | |
catch (IOException ioe) { | |
System.out.println("Error IOException"); | |
} | |
} | |
} | |
} |
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