string secret(string $question, bool $fallback = true) Prompt the user

int callSilent(string $command, array $arguments = array()) Call another

void info(string $string) Write a string as information output.

bool confirm(string $question, bool $default = false) Confirm a question

bool hasArgument(string|int $name) Determine if the given argument is present

OutputInterface getOutput() Get the output implementation.

string|array option(string $key = null) Get the value of a command option

void question(string $string) Write a string as question output.

array all() Get all of the commands registered with the console.

string|array argument(string $key = null) Get the value of a command argument