std::env::vars - Rust
Description: API documentation for the Rust `vars` fn in crate `std`.
Keywords: rust, rustlang, rust-lang, vars

# 1.0.0[−][src]Function std::env::vars

ⓘImportant traits for 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.

# 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 the `env::vars_os` function.

# 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);
    }Run