Question

write a java program to calculate the sum of all the prime numbers between the range of 1 and 100.​

Answer 1

Explanation:

there are 25 prime numbers2,5,7,11,13,17,19

Answer 2

Answer:

import java.util.Scanner;

class PrimeNumbers2

{

public static void main (String[] args)

{

Scanner scanner = new Scanner(System.in);

int i =0;

int num =0;

//Empty String

String primeNumbers = "";

System.out.println("Enter the value of n:");

int n = scanner.nextInt();

scanner.close();

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

{

int counter=0;

for(num =i; num>=1; num--)

{

if(i%num==0)

{

counter = counter + 1;

}

}

if (counter ==2)

{

//Appended the Prime number to the String

primeNumbers = primeNumbers + i + " ";

}

}

System.out.println("Prime numbers from 1 to n are :");

System.out.println(primeNumbers);

}

}

Output:

Enter the value of n:

150

Prime numbers from 1 to n are :

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89

97 101 103 107 109 113 127 131 137 139 149