Java Program to Print Prime Numbers from 1 to N or 1 to 100


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:-


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