Flashcards for:
C++ Functions - Introduction

The 'void' keyword is used in the function declaration to indicate that the function does not return any value.

A common error occurs when a function is called before it is defined or declared. This results in a compiler error. Solution: Define the function before calling it or declare it before calling and define it afterward.

The code outputs 'Hello from main' to the console and then calls the myFunction() function, which executes its own code, assuming myFunction() is properly defined elsewhere.

The code within a function is encapsulated and does not execute during program flow; it only executes when the function is explicitly called from another part of the program.

Informing the compiler about a function's return type, name, and parameters is essential for enabling the compiler to correctly parse and implement function calls, thereby preventing compilation errors.

1. Declaration: Inform the compiler about the function's return type, name, and parameters. 2. Definition: Write the actual code inside the function. 3. Invocation: Call the function to execute its code.

If you try to invoke a function that has not been declared or defined, the compiler will generate an error indicating that the function is not recognized, as it has no information about its existence.

Functions improve readability by breaking down code into manageable blocks, enhance reusability by allowing code to be reused across the program, and support modularity by enabling the division of complex problems into simpler functions.

Function declaration informs the compiler about the function's return type, name, and parameters, improving code readability by separating the function's interface from its implementation.

The main function is the entry point of any C++ program. Execution starts at the first line of the main function and ends at its last line or at a return statement. It often calls other functions to perform tasks.

The output of the code example is: Hello from main Hello from function This output results from the main function calling the myFunction() which then executes its own print statement.

The command outputs the string 'Hello from function' followed by a newline to the console. `std::cout` is the standard output stream in C++ and `std::endl` denotes the end of the line.

To invoke a function in C++, you call it by its name followed by parentheses, e.g., myFunction(). During invocation, the code within the function body is executed.

A function in C++ is a block of code grouped together to solve a specific problem or perform a specific task. Functions are used to execute code only when called, making programs more modular, readable, and reusable.

A function in C++ consists of a return type, a function name, parameters (optional), and a function body enclosed in curly braces. Example: void myFunction() { // function body }.