Update java_exception_handling(try-catch).java

Author: neelshah2409

Hackerrank/java_exception_handling(try-catch).java

@@ -1,3 +1,12 @@
+/*Exception handling is the process of responding to the occurrence, during computation, of exceptions – anomalous or exceptional conditions requiring special processing – often changing the normal flow of program execution. (Wikipedia)
+
+Java has built-in mechanism to handle exceptions. Using the try statement we can test a block of code for errors. The catch block contains the code that says what to do if exception occurs.
+
+This problem will test your knowledge on try-catch block.
+
+You will be given two integers  and  as input, you have to compute . If  and  are not  bit signed integers or if  is zero, exception will occur and you have to report it. Read sample Input/Output to know what to report in case of exceptions.
+*/
+
 import java.io.*;
 import java.util.*;
 import java.text.*;
@@ -11,15 +20,19 @@ public static void main(String[] args) {
 
     Scanner scan = new Scanner(System.in);
     try {
-      int x = scan.nextInt();
+     //taking 2 numbers inputs
+        int x = scan.nextInt();
       int y = scan.nextInt();
+        //dividing 2 numbers
       System.out.println(x / y);
     }
      catch(ArithmeticException | InputMismatchException e) {
       if (e instanceof ArithmeticException) {
+          //if there is arithmetic exception occured in try block then it will be catched here
         System.out.println("java.lang.ArithmeticException: / by zero");
       } else if (e instanceof InputMismatchException){
         System.out.println("java.util.InputMismatchException");
+          //if there is inputmismatch exception occured in try block then it will be catched here
       }
     }
     scan.close();