Introduction to Computer Programming: Functions (Com 102) Chapter 1

Functions in C++ Programming

• A function is a block of code that can be called multiple times from different parts of a program, making it reusable.
• Benefits of using functions include:
  • Constructing programs from simple, small components
  • Avoiding repeated code
  • Enabling software reuse by packaging functions into library codes
• A function involves two parties: the caller and the function being called
• The caller passes arguments to the function, which receives them, performs operations, and returns a result back to the caller
• Functions promote ease of maintenance and understanding by reducing code repetition
• A function prototype (declaration) is required before its implementation

Example: Using Functions

• Suppose we need to evaluate the square of two integers multiple times
• We can write a function called getSquare() to perform this operation
• The getSquare() function can be reused whenever needed, avoiding code repetition
• The function would take an integer as an argument, perform the square operation, and return the result

This quiz covers the concept of functions in computer programming, including the need for functions and how they are used to avoid rewriting code.