Functions in C

In C programming, a Function is a self-contained block of code that performs a specific task. It’s a fundamental building block that allows you to break down a program into smaller, manageable parts. Functions enable code reusability, modularity, and organization. They play a crucial role in structuring and simplifying complex programs.

In the below PDF we discuss about Functions in detail in simple language, Hope this will help in better understanding.

C Tutorial

Defining a Functions in C:

return_type function_name( parameter list ) {

   body of the function


A function definition in C programming consists of a function header and a function body. Here are all the parts of a function −

Return Type − A function may return a value. The return_type is the data type of the value the function returns. Some functions perform the desired operations without returning a value. In this case, the return_type is the keyword void.

Function Name − This is the actual name of the function. The function name and the parameter list together constitute the function signature.

Parameters − A parameter is like a placeholder. When a function is invoked, you pass a value to the parameter. This value is referred to as actual parameter or argument. The parameter list refers to the type, order, and number of the parameters of a function. Parameters are optional; that is, a function may contain no parameters.

Function Body − The function body contains a collection of statements that define what the function do

Related Question

A function in C is a self-contained block of code that performs a specific task. It can take inputs, process them, and produce outputs. Functions promote code modularity and reusability, making it easier to manage and maintain programs.

The return type specifies the data type of the value that the function will return to the caller. It’s declared before the function name. For instance, in int calculateSum(int x, int y), the return type is int.

Arguments or parameters are values that you pass to a function when calling it. These values are used by the function for its calculations or operations.

A void function in C is a function that doesn’t return a value. Its return type is specified as void. Void functions are often used for tasks that don’t require a return value, such as printing messages to the console.

Yes, functions in C can call other functions, including themselves (this is known as recursion). Function calls allow you to break down complex tasks into smaller, more manageable components.


Introduction to C In the

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Constants in C Constants play

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