Program of bluej to check prime or not
Answers
With Scanner class
import java.util.*;
public class Prime
{
public static void main(String[]args)
{
Scanner scan = new Scanner(System.in);
System.out.println("Enter a Number :");
int n= scan.nextInt();
int i,c=0;
for(i=1;i<=n;i++)
{
if(n%i==0)
c=c+1;
}
if(c==2)
{
System.out.println(n+" is a prime number");
}
else
{
System.out.println(n+" is not a prime number");
}
}
}
Without Sccaner class
public class Prime
{
public static void main(int n)
{
int i,c=0;
for(i=1;i<=n;i++)
{
if(n%i==0)
c=c+1;
}
if(c==2)
{
System.out.println(n+" is a prime number");
}
else
{
System.out.println(n+" is not a prime number");
}
}
}
Note: initialize n in the method call
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