Wednesday 18 January 2017

WAP to check that given number is prime or not.

import java.util.*;
class primeornot{
public static void main(String [] args){
int i,a;
int flag=0;
Scanner inp =new Scanner(System.in);
System.out.println("enter number");
a=inp.nextInt();
for(i=2;i<=(a/2);++i){
if(a%i==0){
flag=1;
break;
}

}
if(flag==0)
System.out.println("is a prime number");
else
System.out.println("is not a prime number");
}
}

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