Question

Check whether Two numbers are twin prime numbers or not

(Twin Primes are the prime numbers with a difference of 2.)

Example: (3 and 5),(5 and 7),(11 and 13) etc

Enter the First number:5
Enter the Second number:7
5 and 7  are Twin prime number

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Code

Java

Python

Java

import java.util.Scanner;
public class TwinPrime
{
    public static boolean isPrime(int num)
    {
        int i=0;
        if(num>1)
        {
            for(i=2;i< num;i++)
            {
                if(num%i==0)
                {
                    return false;
                }
            }
            return true;
        }
        else
        {
            return false;
        }
    }

    public static void main()
    {
        int firstNumber=0,secondNumber=0,difference=0;
        boolean isFirstNumberPrime=false,isSecondNumberPrime=false;
        Scanner sc=new Scanner(System.in);
        System.out.println("ENTER FIRST NUMBER:");
        firstNumber=sc.nextInt();
        System.out.println("ENTER SECOND NUMBER:");
        secondNumber=sc.nextInt();
        isFirstNumberPrime=isPrime(firstNumber);
        isSecondNumberPrime=isPrime(secondNumber);

        difference=Math.abs(firstNumber-secondNumber);
        // checking if the difference between two numbers is equal to 2
        // else both the number is not twin prime numbers
        if(difference==2)
        {
            if(isFirstNumberPrime==false || isSecondNumberPrime==false)
            {
               System.out.println(firstNumber+" AND "+secondNumber+" ARE NOT TWIN PRIME NUMBERS");

            }
            else
            {
                System.out.println(firstNumber+" AND "+secondNumber+" ARE TWIN PRIME NUMBERS");
            }
        }
        else
        {
            System.out.println(firstNumber+" AND "+secondNumber+" ARE NOT TWIN PRIME NUMBERS");
        }
    }
}

Python

def isPrime(number):
    if(number>1):
        for i in range(2,number):
            if(number%i==0):
                return False

        return True
    else:
        return False

if(__name__=='__main__'):
    firstNumber=int(input("Enter the First number:"))
    secondNumber=int(input("Enter the Second number:"))
    isFirstNumberPrime=isPrime(firstNumber)
    isSecondNumberPrime=isPrime(secondNumber)
    differenceBetweenTwoNumbers=abs(firstNumber-secondNumber)

    if(differenceBetweenTwoNumbers==2):
        if(isFirstNumberPrime==True and isSecondNumberPrime==True):
            print(firstNumber,"and",secondNumber," are Twin prime number")
        else:
            print(firstNumber, "and", secondNumber, " are not Twin prime number")
    else:
        print(firstNumber, "and", secondNumber, " are not Twin prime number")