Prime number is a number which is not having any factors except 1 & itself.
Java Program to Print Prime Numbers from 1 to 100
import java.util.*;
class PrimeNumber
{
public static void main(String args[])
{
int num, num1, num2, t, count=0;
int flag;
Scanner scan = new Scanner(System.in);
System.out.print("Enter Starting Range : ");
num1 = scan.nextInt();
System.out.print("Enter Ending Range : ");
num2 = scan.nextInt();
System.out.println("Prime Numbers are in Between " + num1 + " and " +num2+ " is :");
for(num=num1;num<=num2;num++)
{
flag=0;
for(t=2;t<=num/2;t++)
{
if(num%t==0)
{
flag=1;
break;
}
}
if(flag==0)
System.out.println(num + " ");
}
}
output:-
