© Mikael Olsson 2018
Mikael OlssonC++17 Quick Syntax Referencehttps://doi.org/10.1007/978-1-4842-3600-0_11

11. Functions

Mikael Olsson1 
Hammarland, Finland

Functions are reusable code blocks that will only execute when called.

Defining Functions

A function can be created by typing void followed by the function’s name, a set of parentheses, and a code block. The void keyword means that the function will not return a value. The naming convention for functions is the same as for variables—a descriptive name with each word initially capitalized, except for the first one.

void myFunction()
  cout << "Hello World";

Calling Functions

The previous function will simply print out a text message when it is called. To invoke it from the main function, ...

Get C++17 Quick Syntax Reference: A Pocket Guide to the Language, APIs and Library now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.