How to get the value of an environment variable using the os package in Golang?

To get the value of an environment variable using the os package in Go, you can make use of the Getenv function. Here's an example:

package main

import (
    "fmt"
    "os"
)

func main() {
    // Get the value of a specific environment variable
    value := os.Getenv("MY_VARIABLE")

    // Check if the environment variable is set
    if value == "" {
        fmt.Println("Environment variable not set")
    } else {
        fmt.Println("Value:", value)
    }
}

In this example, we use os.Getenv function to retrieve the value of an environment variable with the name "MY_VARIABLE". The function returns an empty string if the environment variable is not set.