#844: docs: update GET docs (#875)

Co-authored-by: Jyotinder Singh <[email protected]>

docs/src/content/docs/commands/GET.md

@@ -4,39 +4,48 @@ description: The `GET` command in DiceDB is used to retrieve the value of a spec
 ---
 
 The `GET` command in DiceDB is used to retrieve the value of a specified key. If the key exists, the value is written and
-if it does not then the command returns `nil`. This is one of the most fundamental operations in DiceDB.
+if it does not then the command returns `nil` and an error is returned if the value stored at key is not a string. This is one of the most fundamental operations in DiceDB.
 
-## Synopsis
+## Syntax
 
 ```bash
 GET key
 ```
 
 ## Parameters
 
-- `key`: The name of the key whose value you want to retrieve. The key is a string, and it is required for the GET command to execute.
+| Parameter | Description                                                              | Type   | Required |
+|-----------|--------------------------------------------------------------------------|--------|----------|
+| key       | The name of the key whose value you want to retrieve. The key is a string.| string | Yes      |
 
-## Return Value
+## Return Values
 
-- `String`: If the specified key exists and holds a string value, the GET command returns the value stored at the key.
-- `nil`: If the specified key does not exist, the command returns `nil`.
-- `Error`: If the specified key exists but is not a string, an error is returned.
+| Condition                                              | Return Value                                                                                       |
+|--------------------------------------------------------|---------------------------------------------------------------------------------------------------|
+| The specified key exists and holds a string value      | The string value stored at the key.                                                               |
+| The specified key does not exist                       | `nil`                                                                                             |
+| The specified key exists but is not a string, or multiple keys are passed | error                                                                                         |
 
 ## Behaviour
 
 When the GET command is issued, DiceDB checks the existence of the specified key:
 
 1. `Key Exists and Holds a String`: The value associated with the key is retrieved and returned.
-2. `Key Does Not Exist`: The command returns `nil`.
+2. `Key Does Not Exist`: The command returns `nil`
 3. `Key Exists but Holds a Non-string Value`: An error is raised indicating that the operation against that key is not permitted.
+4. `Multiple Keys Passed`: If multiple keys are passed to the GET command, an error is raised, as the command only accepts a single key at a time.
 
 The GET command is a read-only operation and does not modify the state of the DiceDB database.
 
-## Error Handling
+## Errors
+1. **Expected string but got another type:**
+    - Error Message: (error) ERR expected string but got another type
+    - Occurs when the specified key holds a value that is not a string (e.g., a list, set, hash, or zset). DiceDB uses strict type checking to ensure that the correct type of operation is performed on the appropriate data type.
 
-The GET command can raise the following errors:
-
-- `WRONGTYPE Operation against a key holding the wrong kind of value`: This error is returned if the specified key holds a value that is not a string (e.g., a list, set, hash, or zset). DiceDB uses strict type checking to ensure that the correct type of operation is performed on the appropriate data type.
+2. **Wrong number of arguments for 'GET' command:**
+    - Error Message: (error) ERR wrong number of arguments for 'get' command
+    - Occurs when multiple keys are passed as parameters.
+
 
 ## Example Usage