Merge pull request #1 from MehraDevesh2022/MehraDevesh2022-patch-1

added new algo. into : algorithms/java/Maths dir..

algorithms/Java/Maths/check-prim-or-not.java

@@ -0,0 +1,21 @@
+import java.util.*;
+
+public class Main{
+    public static void main(String[] args) {
+    Scanner scn = new Scanner(System.in);
+    int num = scn.nextInt();
+    boolean ans = isPrime(num);
+      if(ans =!  true) System.out.println("not prime");
+      else System.out.println("prime");
+    }
+    
+   
+    public static boolean isPrime(int num){
+        for(int i=2; i*i<num; i++){
+            if(num %2 ==0){
+                return false;
+            }
+        }
+        return true;
+    }
+}