added content

Ram swaroop · Ram swaroop · commit 932b96a42067 · 2015-11-27T11:15:14.000+05:30
diff --git a/_posts/2015-05-14-variables-and-literals.md b/_posts/2015-05-14-variables-and-literals.md
@@ -273,8 +273,10 @@ class Casting {
 }
 {% endhighlight %}
 
-There is another rule which you must be aware of, i.e, __the result of an expression involving anything int-sized or 
-smaller is always an `int`__. Check this out:
+#### There are some rules which you must be aware of:
+
+* The result of an expression involving anything int-sized or smaller is always an `int`, so we must explicitly cast 
+it. Check this out:
 
 {% highlight java %}
 byte a = 3;     // No problem, 3 fits in a byte
@@ -301,6 +303,13 @@ byte c = (byte) (a + b);
 
 solves the issue.
 
+* In case of compound assignment operators, explicit cast isn't required. The below code compiles just fine:
+
+{% highlight java %}
+byte b = 3;
+b += 7; // No problem - adds 7 to b (result is 10)
+{% endhighlight %}
+
 #### What happens when you cast a large value to store it in a small container
 
 When you do a explicit cast, the compiler just keeps __the number of bits (from right)__ that the variable type can hold 
