Welcome to functions—one of JavaScript's most powerful features! Think of functions as named, reusable blocks of code that you can create to perform specific tasks.
Just like a calculator has a "square root" button you can press anytime, functions let you run the same code easily.
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What's a task you do repeatedly that could benefit from being a single "button"?
Functions help you avoid writing the same code over and over again. Instead of copying and pasting, you write the logic once inside a function and then call it whenever you need it. This is a core programming principle called DRY (Don't Repeat Yourself).
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How does updating code in one function instead of five places make it less error-prone?
Creating a function in JavaScript uses the function keyword, followed by a name you choose, parentheses (), and curly braces {}:
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Why do you think JavaScript uses curly braces instead of just indentation to group function code?
To use a function, you call it by writing its name followed by parentheses:
This tells JavaScript to find the function with that name and execute all the code inside its body. You can call the same function as many times as you need.
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If you define a function but never call it, what happens?
