What is variable number of arguments in C?

Variable length argument is a feature that allows a function to receive any number of arguments. There are situations where we want a function to handle variable number of arguments according to requirement. 1) Sum of given numbers.

Which operator is used to receive the variable number of arguments for a function?

In mathematics and in computer programming, a variadic function is a function of indefinite arity, i.e., one which accepts a variable number of arguments. Support for variadic functions differs widely among programming languages. The term variadic is a neologism, dating back to 1936–1937.

Which type is used to store the arguments when the number of arguments for a function is not constant in C?

1 Answer. Yes you can do it in C using what are referred to as Variadic Functions. The standard printf() and scanf() functions do this, for example. Put the ellipsis (three dots) as the last parameter where you want the ‘variable number of parameters to be.

What is variable argument function?

A variable argument function (variadic function) is a function that can accept an undefined number of arguments. In many programming languages, formatted output functions are defined as variadic functions. To get access to the variable argument list macros va_arg, va_end and va_start from the STDARG.

Which header file includes a function for variable number of arguments?

stdarg.h
Explanation: stdarg. h is the header file which should be included if a function has to be defined such that it can accept variable number of arguments.

How many arguments can a function take?

Except for functions with variable-length argument lists, the number of arguments in a function call must be the same as the number of parameters in the function definition. This number can be zero. The maximum number of arguments (and corresponding parameters) is 253 for a single function.

How many arguments does then function take?

Any number of arguments can be passed to a function. There is no limit on this. Function arguments are stored in stack memory rather than heap memory.

When to use a variable argument list in C?

You can use variable argument lists when you need to make a function so general that even the number and types of arguments can vary. The family of functions is an example of functions that use variable argument lists. printf argument-declaration-list

What happens when a function takes a variable number of arguments?

Declaration of a function that takes a variable number of arguments requires at least one placeholder argument, even if it is not used. If this placeholder argument is not supplied, there is no way to access the remaining arguments. When arguments of type char are passed as variable arguments, they are converted to type int.

How to use variable number of parameters in C programming language?

The C programming language provides a solution for this situation and you are allowed to define a function which can accept variable number of parameters based on your requirement. The following example shows the definition of such a function. int func(int, ) { . . . } int main() { func(1, 2, 3); func(1, 2, 3, 4); }

Can a function be called without arguments in C?

A function in C can be called either with arguments or without arguments. These function may or may not return values to the calling functions. All C functions can be called either with arguments or without arguments in a C program. Also, they may or may not return any values.