Problem Solving and Python Programming MCQs | Page - 21

 the maximum function returns the maximum of the parameters, in this case the numbers supplied to the function. it uses a simple if..else statement to find the greater value and then returns that value.

 python has a nifty feature called documentation strings, usually referred to by its shorter name docstrings. docstrings

 built-in functions and user defined ones. the built-in functions are part of the python language. examples are: dir(), len() or abs(). the user defined functions are functions created with the def keyword.

 functions can be defined inside a module, a class or another function.

 each object in python has a unique id. the id() function returns the object’s id.

 functions that are always available for usage, functions that are contained within external modules, which must be imported and functions defined by a programmer with the def keyword.

 a function is created to do a specific task. often there is a result from such a task. the return keyword is used to return

 python supports the creation of anonymous functions (i.e. functions that are not bound to a name) at runtime, using a construct called lambda. lambda functions are restricted to a single expression. they can be used wherever normal functions can be used.

 the lambda keyword creates an anonymous function. the x is a parameter, that is passed to the lambda function. the parameter is followed by a colon character.

 lambda definition does not include a return statement. it always contains an expression which is returned. also note that we can put a lambda definition anywhere a function is expected. we don’t have to assign it to a variable at all.