java program to chekc whether number is prime code example
Example 1: making list of prime numbers java
Now let’s see print first 10 prime numbers in java.
public class FirstTenPrimeNumbers
{
public static void main(String[] args)
{
int count = 0, number = 0, a = 1, b = 1;
while(number < 10)
{
b = 1;
count = 0;
while(b <= a)
{
if(a%b == 0)
count++;
b++;
}
if(count == 2)
{
System.out.printf("%d ", a);
number++;
}
a++;
}
}
}
Example 2: how to check if number prime in java
public class PrimeNumberInJava
{
public static void main(String[] args)
{
int a, b = 0, flag = 0;
int number = 17;
b = number / 2;
if(number == 0 || number == 1)
{
System.out.println(number + " is not prime number");
}
else
{
for(a = 2; a <= b; a++)
{
if(number % a == 0)
{
System.out.println(number + " is not prime number.");
flag = 1;
break;
}
}
if(flag == 0)
{
System.out.println(number + " is prime number.");
}
}
}
}