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#How to use printf in c with two or more functions how to

Function definition – This contains all the statements to be executed.

Function call – This calls the actual function.

Function declaration or prototype – This informs compiler about the function name, function parameters and return value’s data type.

C function declaration, function call and function definition:

The core concept of C functions are, re-usability, dividing a big task into small pieces to achieve the functionality and to improve understandability of very large C programs.ģ.

Consider the given code, here we have a float variable named num and its value is '10.23456'. Given a float value and we have to print the value with specific number of decimal points.

#How to use printf in c with two or more functions how to

A large C program can easily be tracked when it is divided into functions. Learn: How to print a float value with any number of digits after the decimal point in C programming language using printf() function Submitted by Manju Tomar, on Septem.We can call functions any number of times in a program and from any place in a program.In order to modify the actual values of variables, the calling statement passes addresses to pointer parameters in a function. With pointer parameters, our functions now can process actual data rather than a copy of data. There is no limit in calling C functions to make use of same functionality wherever required. Pointers give greatly possibilities to ‘C’ functions which we are limited to return one value.C functions are used to avoid rewriting same logic/code again and again in a program.Actually, Collection of these functions creates a C program. C function contains set of instructions enclosed by “” which performs specific operation in a C program. Pre-defined or Library Functions and User-Defined Functions in C 1. The image below is an example of pre-defined functions. Ex: printf (), scanf (), sqrt (), strlen () etc. The definitions of the pre-defined functions are written in header files. The printf() function is used for output. Creating/Adding user defined function in C libraryĪ large C program is divided into basic building blocks called C function. Pre-defined functions are already defined in C Compiler system libraries. Prev Page The printf() and scanf() functions are used for input and output in C language.C function without arguments and with return value.C function without arguments and without return value.C function with arguments and without return value.C function with arguments and with return value.

C function declaration, function call and definition with example program.

Get more detail about structure in C programming.