# Function std::env::vars

1.0.0 · source ·

    pub fn vars() -> Vars ⓘ

Expand description

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.

## Panics

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 `env::vars_os()`.

## Examples

    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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