The name of the environment variable to set.
The string value for this environment variable.
This function sets an environment variable for the current process. Both arguments are strings. The value of an environment variable can be acquired using the function getenv.
Gamma> setenv("high", "40");
t
Gamma> getenv("high");
"40"
Gamma> low = 20;
20
Gamma> getenv("low");
nil
Gamma>