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Update isPrime.java #1743

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13 changes: 6 additions & 7 deletions isPrime.java
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Original file line number Diff line number Diff line change
@@ -1,27 +1,26 @@
import java.util.*;
public class B{
public class Main{
public static void main(String args[]){

System.out.println("Enter a Number");
System.out.println("Enter a Number:");
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
if(isPrimeNumber(n))
System.out.println("This is a Prime Number");
if(isPrimeNumber(n)==true)
System.out.println(n+" is a Prime Number");
else
System.out.println("This is not a Prime Number");
System.out.println(n+" is not a Prime Number");
}

static boolean isPrimeNumber(int n) {
if (n<2)
return false;
if (n==2)
return true;
if (n%2==0)
return false;
for(int i=3;i*i<=n;i+=2) {
if(n%i==0)
return false;
}
return true;
}
}