Creating Functions

One of the fundamental aspects of JavaScript is the ability to create functions. Functions allow us to encapsulate a block of code that can be reused and executed multiple times throughout our program.

To create a function in JavaScript, we use the function keyword followed by the name of the function and a set of parentheses. Any parameters that the function takes in are listed within these parentheses. We can also define a block of code to be executed within curly braces {}.

Here's an example of a function declaration that takes in a name parameter and logs a greeting message to the console:

1function greet(name) {
2  console.log(`Hello, ${name}!`);
3}
4
5// Call the greet function
6// Output: Hello, John!
7greet('John');

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// Example of a function declaration

function greet(name) {

  console.log(`Hello, ${name}!`);

}

​

greet('John');