**Prime number in Java: Prime number is a number that is greater than 1 and divided by 1 or itself only. In other words, prime numbers can't be divided by other numbers than itself or 1. For example 2, 3, 5, 7, 11, 13, 17.... are the prime numbers.**

**Program -**

**public** **class** PrimeExample{
**public** **static** **void** main(String args[]){
**int** i,m=0,flag=0;
**int** n=3;//it is the number to be checked
m=n/2;
**if**(n==0||n==1){
System.out.println(n+" is not prime number");
}**else**{
**for**(i=2;i<=m;i++){
**if**(n%i==0){
System.out.println(n+" is not prime number");
flag=1;
**break**;
}
}
**if**(flag==0) { System.out.println(n+" is prime number"); }
}//end of else
}
}

**Output -**

`3 is prime number`