Java program to find sum of prime numbers from 1 to n

Java program to find sum of prime numbers

In this article, we will discuss the concept of Java program to find sum of prime numbers from 1 to n

In this program, we are going to learn how to calculate sum of prime numbers 1 to n using different methods in Java language.

This is done using for loop,while loop,do-while loop in Java language

Code to calculate sum of prime numbers

Code to calculate sum of prime numbers using for loop

In this program, we will calculate sum of prime numbers 1 to n using for loop in Java language

Program 1

//find sum of prime numbers from 1 to n
import java.util.*;
public class PrimeSum{
public static void main(String args[]){
  Scanner sc=new Scanner(System.in);
  //scanner class for input
  
int i,num,count, sum=0;
System.out.println("Please Enter maximum value: ");
int maxValue=sc.nextInt();

System.out.println("Sum of Prime numbers between 1 to "+maxValue+" are : ");

//forloop for finding and printing all prime numbers in given range
for(num=1; num<=maxValue; num++){
  count=0;
  for(i=2; i<=num/2; i++){
    if(num%i==0){
      count++;
      break;
    }
}
if(count==0 && num !=1){
  sum+=num;
}
}
  System.out.println(sum);
}
}

When the above code is executed, it produces the following result

Please Enter maximum value
50
Sum of Prime numbers between 1 to 50 are :
328

 

program to find sum of prime numbers using while loop

In this program, we will calculate sum of prime numbers 1 to n using while loop in Java language

Program 2

//find sum of prime numbers from 1 to n
import java.util.*;
public class PrimeSum_While{
public static void main(String args[]){
  Scanner sc=new Scanner(System.in);
  //scanner class for input
  
int i,num,count, sum=0;
System.out.println("Please Enter maximum value: ");
int maxValue=sc.nextInt();

System.out.println("Sum of Prime numbers between 1 to "+maxValue+" are : ");

//forloop for finding and printing all prime numbers in 1 to new
num=1;
while( num<=maxValue){
  count=0;
  i=2; 
  while(i<=num/2){
    if(num%i==0){
      count++;
      break;
    }
     i++;
}
if(count==0 && num !=1){
  sum+=num;
}
num++;
}
  System.out.println(sum);
}
}

When the above code is executed, it produces the following result

Please Enter maximum value
25
Sum of Prime numbers between 1 to 25 are :
100

 

Program to find sum of prime numbers using do-while loop

In this program, we will calculate sum of prime numbers 1 to n using Do-while loop in Java language

Program 3

//find sum of prime numbers from 1 to n
import java.util.*;
public class PrimeSum_DoWhile{
public static void main(String args[]){
  Scanner sc=new Scanner(System.in);
  //scanner class for input
  
int i,num,count, sum=0;
System.out.println("Please Enter maximum value: ");
int maxValue=sc.nextInt();

System.out.println("Sum of Prime numbers between 1 to "+maxValue+" are : ");

//forloop for finding and printing all prime numbers in 1 to new
num=1;
do{
  count=0;
  i=2; 
do{
    if(num%i==0){
      count++;
      break;
    }
     i++;
} while(i<=num/2);
if(count==0 && num !=1){
  sum+=num;
}
num++;
}while( num<=maxValue);
  System.out.println(sum);
}
}

 

When the above code is executed, it produces the following result

Please Enter maximum value
200
Sum of Prime numbers between 1 to 200 are :
4227

 

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