void info(string $string, null|int|string $verbosity = null) Write a string

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

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

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

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

string ask(string $question, string $default = null) Prompt the user for

int run(InputInterface $input, OutputInterface $output) Run the console

string ask(string $question, string $default = null) Prompt the user for

OutputInterface getOutput() Get the output implementation.

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