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1. Suppose x = 3 and y = 2; show the output, if any, of the following code. What is the output if x = 3 and y = 4? What is the output of x = 2 and y = 2?

 if (x > 2)
        {
            if (y > 2)
            {
                z = x + y;
                System.out.println (“z is ” +z);
            }
        }

        else
        {
            System.out.println (“x is ” +x);

Jawaban :

Jika dimisalkan x = 3 dan y = 2, tidak ada keluar hasil output dari coding yang telah kita buat.

Jika dimisalkan x = 3 dan y = 4, maka hasil output dari coding yang kita lakukan adalah z is 7

Jika dimisalkan x = 2 dan y = 2, maka hasil output dari coding yang kita lakukan adalah x is 2

2. What is y after the following switch statement is executed?

x = 3; y = 3

switch (x = 3)
        {
            case 6: y = 1;
            default: y += 1;
        }

Jawaban :

Maka, hasil y adalah 2

3. Use a switch statement to rewrite the following if statement

if (a == 1)
                x += 5;
else if (a == 2)
                x += 10;
else if (a == 3)
                x += 16;
else if (a == 4)
                x += 34;

Jawaban :

import java.util.Scanner;

public class Soal4Cnomor3
{
public static void main (String[]args)
{
int a;
int x;

Scanner input = new Scanner (System.in);

System.out.print (“Input a [1 – 4] : “);

x = input.nextInt();

switch (x)
{
case 1:
System.out.print (“x = “);
System.out.println(x+=5);
break;
case 2:
System.out.print (“x = “);
System.out.println (x+= 10);
break;
case 3:
System.out.print (“x = “);
System.out.println (x+=16);
break;
case 4:
System.out.print (“x = “);
System.out.println (x+=34);
break;
default:
System.out.println (“Silahkan memilih angka 1, 2, 3, dan 4”);
}
}
}

4. Use a ternary operator to rewrite the following if statement

if (x >65)
            System.out.println (“Passed”);
else
            System.out.println (“Failed”);

Jawaban :

import java.util.Scanner;

public class Soal4Cnomor4
{
public static void main (String[]args)
{
int x;

Scanner input = new Scanner (System.in);

System.out.print (“Input a value [0 – 100] : “);

try
{
x = input.nextInt();

if (x >65)
System.out.println (“Passed”);
else
System.out.println (“Failed”);
}
catch (Exception e)
{
System.out.println (“Input must be number”);
}
}
}

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