Expand description
Decrements and returns the new value stored by the given environment variable key. In case the variable does not exist, it will decrement to -1. The updated value will be returned.
Arguments
key
- The environment variable name
Example
fn main() {
envmnt::set_u8("ENV_VAR", 5);
let value = envmnt::decrement("ENV_VAR");
assert_eq!(value, 4);
}