Tutorial by Topics: arguments

Variable arguments are used by functions in the printf family (printf, fprintf, etc) and others to allow a function to be called with a different number of arguments each time, hence the name varargs. To implement functions using the variable arguments feature, use #include <stdarg.h>. To ca...

int main(int argc, char *argv[]) ParameterDetailsargcargument count - initialized to the number of space-separated arguments given to the program from the command-line as well as the program name itself.argvargument vector - initialized to an array of char-pointers (strings) containing the ...

Most command line tools rely on arguments passed to the program upon its execution. Instead of prompting for input, these programs expect data or specific flags (which become booleans) to be set. This allows both the user and other programs to run the Python file passing it data as it starts. This s...

References: proc Argument Expansion (section 5)

Varargs, as they are commonly known, allow functions to take an arbitrary number of arguments without specification. All arguments given to such a function are packaged into a single structure known as the vararg list; which is written as ... in Lua. There are basic methods for extracting the number...

Named Arguments Ref: MSDN Named arguments enable you to specify an argument for a particular parameter by associating the argument with the parameter’s name rather than with the parameter’s position in the parameter list. As said by MSDN, A named argument , Enables you to pass the argument t...

Keyword arguments were introduced in Ruby 2.0, and improved in Ruby 2.1 with the addition of required keyword arguments. A simple method with a keyword argument looks like the following one: def say(message: "Hello World") puts message end say # => "Hello World" ...

Rust's standard library does not contain a proper argument parser (unlike argparse in Python), instead preferring to leave this to third-party crates. These examples will show the usage of both the standard library (to form a crude argument handler) and the clap library which can parse command-l...

The ByRef and ByVal modifiers are part of a procedure's signature and indicate how an argument is passed to a procedure. In VBA a parameter is passed ByRef unless specified otherwise (i.e. ByRef is implicit if absent). Note In many other programming languages (including VB.NET), parameters are impl...