Chapter VI · Functions
Parameters
Parameters are placeholder variables defined in a function signature to accept incoming input data.
01 How It Works
Think of blank input fields on a form waiting to be filled out.
Parameters act as local variables inside the function body initialized by passed argument values.
example.js
function greet(name) {
console.log(`Hello ${name}`);
}1. Declare a function with parentheses.
2. List parameter identifiers inside.
3. Reference parameters in code logic.
02 Practical Example
Here is how you might see this concept applied in real-world code:
practical.js
function calculateTax(amount, rate) {
return amount * rate;
}Key Takeaway
Parameters allow functions to accept dynamic inputs.