Function std::env::vars

ⓘImportant traits for Vars
impl Iterator for Vars
    type Item = (String, String);
pub fn vars() -> Vars

Returns an iterator of (variable, value) pairs of strings, for all the environment variables of the current process.

The returned iterator contains a snapshot of the process's environment variables at the time of this invocation. Modifications to environment variables afterwards will not be reflected in the returned iterator.


While iterating, the returned iterator will panic if any key or value in the environment is not valid unicode. If this is not desired, consider using the env::vars_os function.


use std::env;

// We will iterate through the references to the element returned by
// env::vars();
for (key, value) in env::vars() {
    println!("{}: {}", key, value);

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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.