diff --git a/README.md b/README.md
index cf3f505..dcd01f3 100644
--- a/README.md
+++ b/README.md
@@ -49,10 +49,8 @@
 |43 | [toFixed](#toFixed)|
 |44 | [generate randomUUID](#generate-random-uuid)|
 |45 | [structuredClone](#structuredClone)|
-
-
-
-
+|46 | [get device orientation](#get-device-orientation)|
+|47 | [CONST vs LET vs VAR](#const-let-var)|
 
 **[⬆ Back to Top](#table-of-contents)**
 ### How to generate a random number in a given range
@@ -982,3 +980,28 @@ console.log("clonedUser.address.street:", clonedUser.address.street);
 
 
 ```
+
+**[⬆ Back to Top](#table-of-contents)**
+### get device orientation
+
+Browsers expose a global variable named screen, which we’ll use to access the information we need.
+
+```javascript
+
+function getOrientation() {  
+    const isPortrait = screen.orientation.type.startswith('portrait')  
+    return isPortrait ? 'portrait' : 'landscape'
+}
+
+```
+
+**[⬆ Back to Top](#table-of-contents)**
+### CONST vs LET vs VAR
+
+|                        | const | Let | Var |
+|------------------------|-------|-----|-----|
+| Can be Reaasigned?     | :x:     | :white_check_mark:   |:white_check_mark:   |
+| Cab be Redeclared?     | :x:    | :x:  | :white_check_mark:  |
+| Block Scope            | :white_check_mark:    |:white_check_mark:   | :x:   |
+| Function Scope         | :white_check_mark:     | :white_check_mark:   | :white_check_mark:   |
+| Stored in Global Scope | :x:     | :x:   | :white_check_mark:   |