How do you pass an optional parameter in C++?

You don’t pass option parameters . You pass optional arguments! For more explicit control than that provided by reserving sentinel values, check out boost::optional<>.24 Eyl 2010

How to pass optional parameters to a function in Python?

In Typescript, making optional parameters is done by appending the “?” at the end of the parameter name in the function when declaring the parameters and the parameters which are not marked with “?” i.e not optional parameter are called as default parameters or normal parameters where it is must and compulsory to pass …

To declare optional function parameters in JavaScript, there are two approaches: Using the Logical OR operator (‘||’) : In this approach, the optional parameter is Logically ORed with the default value within the body of the function. Note: The optional parameters should always come at the end on the parameter list.