How do you declare an optional parameter in C#?
How do you declare an optional parameter in C#?
By Params Keyword: You can implement optional parameters by using the params keyword. It allows you to pass any variable number of parameters to a method. But you can use the params keyword for only one parameter and that parameter is the last parameter of the method.
Does C have optional parameters?
C does not support optional parameters. Only way is implementation dependent. Eg, if pointer is NULL then is considered as optional parameter and not used.
What is optional in C?
class optional; (since C++17) The class template std::optional manages an optional contained value, i.e. a value that may or may not be present. A common use case for optional is the return value of a function that may fail.
What is an optional parameter in C#?
C# Optional Arguments It means we call method without passing the arguments. The optional parameter contains a default value in function definition. If we do not pass optional argument value at calling time, the default value is used.
When adding optional parameters in a parameter list what is a valid requirement?
When adding optional parameters in a parameter list, what is a valid requirement? The parameters must appear to the right of all mandatory parameters.
What is ref in C#?
The ref keyword in C# is used for passing or returning references of values to or from Methods. Basically, it means that any change made to a value that is passed by reference will reflect this change since you are modifying the value at the address and not just the value.
Are there default parameters in C?
In C/C++ it is possible to define default values for all or some arguments of a function. If such default values are specified for a function, one does not have to specify the corresponding argument when invoking this function: if argument is not specified, the default value will be used.
