27 lines
705 B
Go
27 lines
705 B
Go
// ## Environment Variables
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package main
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// Use the `os` package to list, set, and get
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// environment variables.
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import "os"
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import "strings"
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import "fmt"
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func main() {
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// `os.Environ` returns a slice of strings in the form
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// `KEY=value`. You can `strings.Split` them to get
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// the key and value.
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for _, e := range os.Environ() {
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pair := strings.Split(e, "=")
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fmt.Println(pair[0])
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}
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fmt.Println()
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// `Setenv` sets a given key, value pair.
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// `Getenv` returns the value at key, or an empty
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// string if the key isn't present.
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os.Setenv("FOO", "bar")
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fmt.Println(os.Getenv("FOO"))
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}
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