vars in std::env - Rust
Description: Returns an iterator of (variable, value) pairs of strings, for all the environment variables of the current process.

## vars

# Function 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

    // Print all environment variables.
    for (key, value) in std::env::vars() {
        println!("{key}: {value}");
    }