Lab Activity 2. Kontrol Alur, Method dan Array

import java.util.Scanner;   public class PenjualanTiket {     public static void main(String[] args) {         int sisaTiket = 10;         int tiketTerjual = 0;         int jumlahTiket = 10;         int pembeli = 0;           Scanner keyboard = new Scanner(System.in);           while (tiketTerjual < jumlahTiket && sisaTiket > 0) {             System.out.print("Masukkan jumlah tiket yang ingin dibeli: ");             int jumlahBeli = keyboard.nextInt();             if (jumlahBeli > 4) {                 System.out.println("Anda tidak bisa membeli lebih dari 4 tiket.");             } else if (sisaTiket < jumlahBeli) {                 System.out.println("Maaf, sisa tiket yang tersisa adalah " + sisaTiket + " tiket.");             } else {                 tiketTerjual += jumlahBeli;                 sisaTiket -= jumlahBeli;                 pembeli++;                 System.out.println("Anda membeli sebanyak " + jumlahBeli + " tiket.");                 if (sisaTiket > 0) {                   System.out.println("Sisa tiket yang tersedia: " + sisaTiket);                 }             }         }           if (sisaTiket == 0) {             System.out.println("Semua tiket telah terjual kepada " + pembeli + " pembeli.");         }       } }

public static double getTotal(double[][] arr) {     double total = 0.0;     for (int row = 0; row < arr.length; row++) {         for (int col = 0; col < arr[row].length; col++) {             total += arr[row][col];         }     }     return total; }   public static double getAverage(double[][] arr) {     double total = getTotal(arr);     return total / (arr.length * arr[0].length); }   public static double getRowTotal(double[][] arr, int row) {     double total = 0.0;     for (int col = 0; col < arr[row].length; col++) {         total += arr[row][col];     }     return total; }   public static double getColumnTotal(double[][] arr, int col) {     double total = 0.0;     for (int row = 0; row < arr.length; row++) {         total += arr[row][col];     }     return total; }   public static double getHighestInRow(double[][] arr, int row) {     double highest = arr[row][0];     for (int col = 1; col < arr[row].length; col++) {         if (arr[row][col] > highest) {             highest = arr[row][col];         }     }     return highest; }   public static double getLowestInRow(double[][] arr, int row) {     double lowest = arr[row][0];     for (int col = 1; col < arr[row].length; col++) {         if (arr[row][col] < lowest) {             lowest = arr[row][col];         }     }     return lowest; }

import java.util.Scanner;   public class NilaiUjian {     public static double hitungRatarata(double n1, double n2, double n3, double n4, double n5) {         double ratarata = (n1 + n2 + n3 + n4 + n5) / 5.0;         return ratarata;     }         public static String tentukanGrade(double nilai) {         if (nilai >= 90) {             return "A";         } else if (nilai >= 80) {             return "B";         } else if (nilai >= 70) {             return "C";         } else if (nilai >= 60) {             return "D";         } else {             return "E";         }     }         /****************************************      *  !!! JANGAN UBAH KODE DI BAWAH !!!   *      ****************************************/     public static void main(String[] args)     {         double nilai1;         double nilai2;         double nilai3;         double nilai4;         double nilai5;         double ratarata;           Scanner keyboard = new Scanner(System.in);           System.out.print("Masukkan nilai ujian ke-1: ");         nilai1 = keyboard.nextDouble();                 System.out.print("Masukkan nilai ujian ke-2: ");         nilai2 = keyboard.nextDouble();           System.out.print("Masukkan nilai ujian ke-3: ");         nilai3 = keyboard.nextDouble();           System.out.print("Masukkan nilai ujian ke-4: ");         nilai4 = keyboard.nextDouble();           System.out.print("Masukkan nilai ujian ke-5: ");         nilai5 = keyboard.nextDouble();           ratarata = hitungRatarata(nilai1, nilai2, nilai3, nilai4, nilai5);           System.out.println("Rata-rata nilai ujian = " + ratarata);         System.out.println("Grade Anda = " + tentukanGrade(ratarata));       } }

public static int firstDigit(int num) { while (num >= 10) { num /= 10; } return num; } public static int lastDigit(int num) { return num % 10; } public static int banyakDigit(int num) { if (num == 0) { return 1; } int count = 0; while (num != 0) { count++; num /= 10; } return count; }

import java.util.Scanner;   public class Main {     public static void main(String[] args) {         Scanner input = new Scanner(System.in);                 System.out.print("Masukkan nilai a: ");         int a = input.nextInt();                 System.out.print("Masukkan nilai b: ");         int b = input.nextInt();                 System.out.print("Masukkan nilai c: ");         int c = input.nextInt();                 double diskriminan = b*b - 4*a*c;         double x1, x2;                 if (diskriminan >= 0) {             x1 = (-b + Math.sqrt(diskriminan)) / (2*a);             x2 = (-b - Math.sqrt(diskriminan)) / (2*a);             System.out.printf("x1 = %.2f\n", x1);             System.out.printf("x2 = %.2f\n", x2);         } else {             System.out.println("Akar-akar dari persamaan kuadrat adalah imajiner.");         }     } }

public static int alternatingSum(int[] arr) {     int sum = 0;     int sign = 1;       for (int i = 0; i < arr.length; i++) {         sum += sign * arr[i];         sign = -sign;     }       return sum; }

 

import java.util.Scanner;   public class Main {     public static void main(String[] args) {         Scanner input = new Scanner(System.in);           System.out.print("Masukkan sebuah bilangan asli: ");         int n = input.nextInt();           if (n <= 1) {             System.out.println("Input tidak valid. Bilangan harus lebih besar dari 1.");             return;         }           for (int i = 2; i <= n; i++) {             while (n % i == 0) {                 System.out.println(i);                 n /= i;             }         }     } }

import java.util.Scanner;   public class Main {     public static void main(String[] args) {         Scanner input = new Scanner(System.in);           System.out.print("Masukkan berat paket Anda (kg): ");         double berat = input.nextDouble();           System.out.print("Masukkan jarak pengiriman (km): ");         double jarak = input.nextDouble();           int tarifPerKm = tarif(berat);         double tarifPengiriman = Math.floor(jarak) * tarifPerKm;           System.out.printf("Tarif Pengiriman = Rp.%,.2f\n", tarifPengiriman);         input.close();     }       public static int tarif(double berat) {         if (berat <= 2) {             return 1500;         }         if (2 < berat && berat <= 6) {             return 3000;         }         if (6 < berat && berat <= 10) {             return 5000;         }         else {             return 5500;         }     } }