Specify interval to sleep for, must be in range [0, 1000000]
Unsets an environment variable.
Returns true if the variable was able to be unset.
Get the numbers of seconds since 1st January 1970, 00:00 UTC
Sets an environment variable with a given value.
Returns true if the operation was successful.
Retrieves a value from the environment if the given key is present,
otherwise it returns Nothing.
Terminate the program with an ExitCode
. This code indicates the
success of the program's execution, and returns the success code
to the program's caller.
The ExitCode
for program.
Exit the program after a successful run.
Exit the program indicating failure.
Quit with a particular exit code
Programs can either terminate successfully, or end in a caught
failure.