C-Functions

97 posts

Difference Between Call by Value and Call by Reference in C

Last Updated: 10 January 2025

Functions can be invoked in two ways: Call by Value or Call by Reference. These two ways are generally differentiated by the type of values ...read more

C Language

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Variadic Functions in C

Last Updated: 07 March 2025

In C, variadic functions are functions that can take a variable number of arguments. This feature is useful when the number of arguments for ...read more

C Basics

C Language

C-Functions

isdigit() Function in C

Last Updated: 10 January 2025

The isdigit() in C is a built-in function that is used to check if the given character is a numeric digit or not. It is defined inside ctype ...read more

C Basics

C Language

C-Functions

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C fopen() Function

Last Updated: 10 January 2025

In C, the fopen() function is used to open a file in the specified mode. The function returns a file pointer (FILE *) which is used to perfo ...read more

Last Updated: 16 April 2025

C language provides various built-in functions that can be used for various operations and manipulations on strings. These string functions ...read more

putchar() function in C

Last Updated: 06 October 2023

The putchar(int ch) method in C is used to write a character, of unsigned char type, to stdout. This character is passed as the parameter to ...read more

C Language

C-Functions

C program to Find the Largest Number Among Three Numbers

Last Updated: 20 March 2025

Given 3 integer numbers, the task is to find the largest number among them.ExamplesInput: a = 10, b = 22, c = 19Output: 22 is the largest nu...read more

strrev() function in C

Last Updated: 10 January 2025

The strrev() function is a built-in function in C and is defined in string.h header file. The strrev() function is used to reverse the given ...read more

toupper() function in C

Last Updated: 10 January 2025

The toupper() function is used to convert lowercase alphabet to uppercase. i.e. If the character passed is a lowercase alphabet then the tou ...read more

Last Updated: 10 January 2025

The time() function is defined in time.h (ctime in C++) header file. This function returns the time since 00:00:00 UTC, January 1, 1970 (Uni ...read more

C Function Arguments and Function Return Values

Last Updated: 10 January 2025

Prerequisite: Functions in CA function in C can be called either with arguments or without arguments. These functions may or may not return ...read more

C Language

C-Functions

memset() in C with examples

Last Updated: 10 January 2025

memset() is used to fill a block of memory with a particular value. The syntax of memset() function is as follows : // ptr == Starting addr ...read more

Function Prototype in C

Last Updated: 02 January 2025

In C, a function prototype is a statement that tells the compiler about the function’s name, its return type, numbers, and data types of i ...read more

C Language

C-Functions

Static Functions in C

Last Updated: 02 January 2025

In C, functions are global by default. The static keyword before a function name makes it a static function. For example, the below function ...read more

C Language

C-Functions

What is the purpose of a function prototype?

Last Updated: 28 September 2023

The Function prototype is necessary to serve the following purposes:Function prototype tells the return type of the data that the function w ...read more

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