## addParam()

The  `addParam()`  command retrieves the value associated with a specific key from the query string of the current request and assigns this value to a target variable. This command is useful for extracting values from query parameters in an HTTP request and storing them in variables for processing.

### Parameters

* param Type: `value` Description: The key of the query string whose value you want to retrieve. It should be a value that represents the key in the query string.
* variable Type: `var` Description: The variable in which the retrieved value from the query string will be stored. It must be a variable that will receive the value associated with the specified key.

### Command Flow

### Usage Example

Suppose the query string of the current request is  `?user=alice&age=30` , and you want to retrieve the value associated with the key  `"user"` .

```javascript
// Variable definitions
userName = ''

// Call the command to retrieve the value for the "user" key and assign it to the variable
addParam("user", userName)

// Return the retrieved value through addResult
addResult(userName)
```

Given the query string  `?user=alice&age=30` , the  `addParam()`  command will retrieve the value  `"alice"`  associated with the key  `"user"`  and store it in the  `userName`  variable. The  `userName`  variable will be returned through  `addResult(userName)` , resulting in the following output:

```javascript
"alice"
```
