Create isPrime.java

isPrime.java

@@ -0,0 +1,30 @@
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.lang.*;
+
+class Prime{
+    static boolean check(int i){
+        if (i%2==0){
+            return false;
+        }
+        else{
+            for(int j=3;j<=Math.sqrt(i);j+=2) {
+                if(i%j==0)
+                    return false;
+            }
+            return true;
+        }
+    }
+
+    public static void main(String[] args) throws Exception{
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        System.out.println("Enter the number to check: ");
+        int n = Integer.parseInt(br.readLine());
+        if(check(n))
+            System.out.println(n+" is prime") ;
+
+        else
+            System.out.println(n+" is NOT prime");
+
+    }
+}