pub fn var<K: AsRef<OsStr>>(key: K) -> Result<String>Expand description
Get the value for an environment variable.
Automatically loads .env on first call (if present and not yet loaded).
Values are read from the current process environment, not directly from
the .env file — so any value set by a previous caller or the shell is visible.
§Errors
Returns Error::Env if the variable contains non-unicode data.
§Examples
let value = dotenv::var("HOME").unwrap();
println!("{}", value);