# Write a program to print first n prime numbers in Java.

AIM: – Write a program to print first n prime numbers in Java.

Prime Number:

prime number is a whole number greater than 1 whose only factors are 1 and itself. A factor is a whole number that can be divided evenly into another number. The first few prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29. Numbers that have more than two factors are called composite numbers.

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Source Code: –

```import java.util.Scanner;

public class PrintNPrime {

public static void main(String[] args) {

int n, num, flag, j, i=2, count = 0;
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the value of n:- ");
n = scanner.nextInt();

System.out.println("First " + n + " Prime numbers are:- ");

//Count is used to keep the track the number of prime numbers printed.
while(count < n) {
num = i;
flag = 0;

/*Checking if a number is prime. If it is not prime then flag
* is incremented by 1 and we come out of the loop.
*/
for(j =2; j<=num/2; j++) {
if(num % j == 0) {
flag++;
break;
}
}
//If value of flag is 0 here, then the number is prime and it is printed.
if(flag == 0) {
System.out.print(num + " ");
count++;
}
i++;
}
}
}```

Output:

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