Question

Wap in Java to store 20 different numbers in a SDA. Pass this array to a function and display only prime numbers along with their sum.​

Answer 1

import java.util.Scanner;

public class Prime {

static boolean isPrime(int number) {

for (int i = 2; i < number; i++)

if (number % i = = 0)

return false;

return true;

}

static void printPrimeAndSum(int[ ] array) {

System.out.println("\nPrime numbers - ");

int primeSum = 0;

for (int number : array)

if (isPrime(number)) {

primeSum += number;

System.out.print(number + " ");

}

System.out.println("\nPrime numbers sum - " + primeSum);

}

public static void main(String[ ] args) {

System.out.println("Enter 20 Integers - ");

int[ ] array = new int[20];

for (int i = 0; i < 20; i++)

array[i] = new Scanner(System.in).nextInt( );

printPrimeAndSum(array);

}

}

Answer 2

$\star\:\:\:\sf\large\underline\blue{Question:-}$

• Write a program in Java to store 20 different numbers in SDA. Pass this array to a function and display only prime numbers along with sum.

$\star\:\:\:\sf\large\underline\blue{Code:-}$

import java.util.*;

class Array

{

static boolean isPrime(int n)

{

int c=0;

for(int i=1;i<=n;i++)

{

if(n%i==0)

c++;

}

return (c==2);

}

static void Print(int a[])

{

System.out.println("The prime numbers are...");

int s=0;

for(int i:a)

{

if(isPrime(i))

{

s+=i;

System.out.print(i+" ");

}

}

System.out.println("Sum of all the prime numbers in the array is: "+s);

}

public static void main(String s[])

{

Scanner sc = new Scanner(System.in);

System.out.println("Enter the elements. ");

int a[]=new int[20];

for(int i=0;i<20;i++)

{

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

a[i]=sc.nextInt();

}

Print(a);

}// end of main()

}// end of class.