Learning C Programming || C Programming C Programming Functions || For Beginners || #C172
11A function is a block of code that performs a specific task.
Suppose, a program related to graphics needs to create a circle and color it depending upon the radius and color from the user. You can create two functions to solve this problem:
create a circle function
color function
Dividing complex problem into small components makes program easy to understand and use.
Types of function
Depending on whether a function is defined by the user or already included in C compilers, there are two types of functions in C programming
There are two types of function in C programming:
Standard library functions
User defined functions
Standard library functions
The standard library functions are built-in functions in C programming to handle tasks such as mathematical computations, I/O processing, string handling etc.
These functions are defined in the header file. When you include the header file, these functions are available for use. For example:
The printf() is a standard library function to send formatted output to the screen (display output on the screen). This function is defined in "stdio.h" header file.
There are other numerous library functions defined under "stdio.h", such as scanf(), fprintf(), getchar() etc. Once you include "stdio.h" in your program, all these functions are available for use.
Learn more about standard library functions in C programming
User-defined function
As mentioned earlier, C allow programmers to define functions. Such functions created by the user are called user-defined functions.
You can create as many user-defined functions as you want.
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