Question

Write a Java Program that takes an integer and tests whether it is divisible by 2, 4 and 5. Apply divisibility rules that say:

a. a number is divisible by 2 if the number is ending in an even digit 0,2,4,6,8.

b. a number is divisible by 4 if last 2 digits of the number are divisible by 4.

c. a number is divisible by 5 if the number is ending in 0 or 5
​

Answer 1

$\textsf{\large{\underline{Solution}:}}$

The given problem is solved using language - Java.

import java.util.Scanner;

public class Java{

   public static void main(String s[]){

       Scanner sc=new Scanner(System.in);

       System.out.print("Enter a number: ");

       int n=sc.nextInt();

       System.out.println("Is the number divisible by 2? - "+(n%2==0));

       System.out.println("Is the number divisible by 4? - "+(n%4==0));

       System.out.println("Is the number divisible by 5? - "+(n%5==0));

   }

}

$\textsf{\large{\underline{Logic}:}}$

1. Accept the number from the user.
2. Check if divisible by 2, 5 and 10 using modulo operator and display the result.

See the attachment for output.

Answer 2

Answer:

Program:-

import java.util.*;

public class Main

{

public static void main(String args[])

{

Scanner in=new Scanner(System.in);

int n,ch,a=0;

System.out.println("Enter a number");

n=in.nextInt();

System.out.println("Enter 1 to check the divisibilty of the number with 2");

System.out.println("Enter 2 to check the divisibilty of the number with 4");

System.out.println("Enter 3 to check the divisibilty of the number with 5");

System.out.println("Enter your choice");

ch=in.nextInt();

switch(ch)

{

case 1:

a=n%10;

if(a==0||a==2||a==4||a==6||a==8)

System.out.println(n+" is divisible by 2");

else

System.out.println(n+" is not divisible by 2");

break;

case 2:

a=n%100;//for last 2 digits

if(a%4==0)

System.out.println(n+" is divisible by 4");

else

System.out.println(n+" is not divisible by 4");

break;

case 3:

a=n%10;

if(a==5||a==0)//Divisibilty rule of 5

System.out.println(n+" is divisible by 5");

else

System.out.println(n+" is divisible by 2");

break;

default:

System.out.println("Invalid choice");

}

}

}

Logic:-

• I simply applied divisibility rule of the given numbers as per your information.
• A proper message is displayed so it is clear to a user.
• In these questions use switch case as it has multiple branching.
• 4 outputs are attached for different cases.