6.1. Function Basics

A function definition typically consists of a return type, a name, a list of zero or more parameters, and a body. The parameters are specified in a comma-separated list enclosed in parentheses. The actions that the function performs are specified in a statement block (§ 5.1, p. 173), referred to as the function body.

We execute a function through the call operator, which is a pair of parentheses. The call operator takes an expression that is a function or points to a function. Inside the parentheses is a comma-separated list of arguments. The arguments are used to initialize the function’s parameters. The type of a call expression is the return type of the function.