Overview

os package provides an Environ() function to get the list all environment variables.

• Get all the env variables. It returns an array of string.

func Environ() []string 

There is also a way to clear all the env variables. Clearenv() function can be used to achieve the same.

func Clearenv()

Code:

package main

import (
    "fmt"
    "log"
    "os"
)

func main() {
    //Set env a to b
    err := os.Setenv("a", "b")
    if err != nil {
        log.Fatal(err)
    }

    err = os.Setenv("c", "d")
    if err != nil {
        log.Fatal(err)
    }

    //Get all env variables
    fmt.Println(os.Environ())

    //Clear all env variables
    os.Clearenv()

    //Again get all env variable
    fmt.Println(os.Environ())
}

Output:

List of all env varialbes on your system including a and b