May 18, 2017

Sreekanth B

How to Find The Sum of The First 1000 Prime Numbers Java Program

Program: 

Write a program to find the sum of the first 1000 prime numbers?

Description:
Write a program to find the sum of the first 1000 prime numbers.

Code:

package com.primesum;

public class Main {

    public static void main(String args[]){
        
        int number = 2;
        int count = 0;
        long sum = 0;
        while(count < 1000){
            if(isPrimeNumber(number)){
                sum += number;
                count++;
            }
            number++;
        }
        System.out.println(sum);
    }
    
    private static boolean isPrimeNumber(int number){
        
        for(int i=2; i<=number/2; i++){
            if(number % i == 0){
                return false;
            }
        }
        return true;
    }
}

Output:

3682913

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