Elements of user-defined functions include the function name, return type, parameters, and the function body.
The definition of functions involves specifying the details of how the function performs its tasks.
Return values and their types denote the data type of the result that a function produces.
Function declaration provides a prototype for the compiler, informing it about the function’s existence, return type, and parameters.
Functions are categorized based on their return values and whether they take arguments.
Functions with no return values are known as void functions, while functions with return values contribute to the overall functionality of a program.
Nesting of functions refers to the practice of calling one function from within another, allowing for a hierarchical and organized code structure.
Passing arrays and strings to functions enables efficient data manipulation, and topics like searching and sorting illustrate practical applications of user-defined functions.
The scope, visibility, and lifetime of variables within functions are critical concepts, influencing how variables are accessed and manipulated throughout the program.
Understanding these key concepts is essential for mastering the art of designing modular and efficient C programs.
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