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:-
