method
def_exception
![Some documentation Importance_1](https://d2vfyqvduarcvs.cloudfront.net/images/importance_1.png?1349367920)
def_exception(n, m, s = StandardError)
public
def_exception(n, m, s)
n: exception_name m: message_form s: superclass(default: StandardError) define exception named ``c'' with message m.
def_exception(n, m, s = StandardError)
public
def_exception(n, m, s)
n: exception_name m: message_form s: superclass(default: StandardError) define exception named ``c'' with message m.