Summary
Invoking a function by its name followed by parentheses (optionally with arguments) causes the program to execute that function’s code and then return control, enabling reusable code blocks to run multiple times with different data.

General domain of usage
User interaction

When you call a function in JavaScript, you tell the program to execute the code inside that function. To call a function, you write its name followed by parentheses. If the function expects data, you provide it inside the parentheses. This process is called **invoking** the function. When a function is called, the JavaScript engine jumps to the function's code, runs it, and then returns to where the call was made. You can call a function as many times as you want, and each call can use different data.

function greet(name) {
  console.log("Hello, " + name + "!");
}

greet("Alice");
greet("Bob");
greet("Charlie");

Which of the following statements about calling functions in JavaScript are true?

JavaScript functions from the fundamentals to modern syntax and best practices. Gain understanding of how functions shape every part of JavaScript, helping create clean, modular, and efficient code. Master both classic patterns and modern approaches to writing reusable, maintainable functions for any project.

Discover how functions organize code, make it reusable, and simplify complex logic. Explore what functions are, why they're essential, and how to define and call them to build cleaner, more efficient JavaScript programs.

Understand how information flows through functions and how scope defines where variables live and interact. Master parameters, return values, and local variables to write predictable, modular code that behaves as expected.

Explore the expressive side of JavaScript with modern syntax and functional techniques. Use arrow functions, callbacks, and function expressions to write concise, flexible, and reusable code that fits today's JavaScript standards.

Calling Functions