In this program, You will learn how to find the sum of all prime numbers between 1 to n in java.

```
Sum of prime numbers upto 10th : 2 + 3 + 5 + 7 = 17
```

```
import java.util.Scanner;
class Main {
public static void main(String args[]) {
int n, i, j, p = 1, s = 0;
Scanner sc = new Scanner(System.in);
System.out.print("Enter a number:");
n = sc.nextInt();
for (j = 2; j <= n; j++) {
p = 1;
for (i = 2; i < j; i++) {
if (j % i == 0) {
p = 0;
break;
}
}
if (p == 1){
s = s + j;
}
}
System.out.println("Sum of all prime numbers:" + s);
}
}
```

```
Enter a number:10
Sum of all prime numbers:17
```