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) {
if (isPrimeNumber(num)) {
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 .