# Print First 10 Prime Numbers in Java

We will write a program to find first ten prime numbers in java . If you are don’t know what are prime numbers  , you should first read about prime numbers in java . In simple word A number which is divided by one and itself is called prime number.

Example 1 : is 21 a prime number?

21 is divided by 1, 3,7 ,21 . Because 21 is divided by 3 and 7 also , so 21 is not a prime number .

Example 2 : is 37 a prime number ?

37 is divided by 1 and 37 only , So 37 is a prime number .

## Print First 10 Prime Numbers in Java

Now we will print first ten prime number using java program . In this program we take variable num and count . We iterate a while loop till print first ten prime numbers .  variable num increment by 1 in each iterate and count increment by 1 when find any number is prime number .

Program description: Program to print the first 10 prime numbers

``````public class FirstTenPrimeNumber {

public static void main(String[] args) {

int num =1 ,count =0;
while ( count < 10) {
System.out.println( num +" is prime number");
count++;
}
num++;
}

}

private static boolean isPrimeNumber(int num) {
if (num <= 1) {
return false;
}
boolean flag = true;
for (int j = 2; j <= Math.sqrt(num); j++) {
if (num % j == 0) {
flag = false;
break;
}
}
return flag;
}

}``````

Output :

``````2 is prime number
3 is prime number
5 is prime number
7 is prime number
11 is prime number
13 is prime number
17 is prime number
19 is prime number
23 is prime number
29 is prime number``````

In this tutorial we learned what is prime numbers , prime number examples and how to find first ten prime numbers . You can learn more java program for interview preparation .