updating readme file

README.md

@@ -1,2 +1,18 @@
-# bitwise-operator
-Bitwise Operator
+# Bitwise Operator
+
+> The operands of all bitwise operators are converted to signed 32-bit integers in two's complement format.Every number has it's own binary representation, used by those operators. To check dec number's binary value, we use `.toString()` method with base argument - '2' for binary.
+
+**Sometime we even use Bitwise OR as equivalent of Math.floor()**
+  ```
+  Example - 
+  var temp = 2.987293874;
+  var result = temp | 0;
+  ```
+
+**Few Uses of bitwise operator** 
+
+- We can convert colors from RGA to Hex format.
+- Variables swap without using third variable (hint - using xor)(redundant with ES6 swap [a, b] = [b, a]).
+- Example section of [https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Operators/Bitwise_Operators].
+- Check if number is even or odd  `Even Number => [(n & 1) === 0]`
+- https://miguelmota.com/blog/bitwise-operators-in-javascript/