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GeezerVison is showing github.com — JavaScript-Basics/10_function_parameter.js at master · last-endcode/JavaScript-Basics

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// function parameter
// parameter like local variable or placeholder
// argument - when invoke/call/run
// u can declare argument use variable too
const name = 'john doe';
const lastname = 'Darwin';
function greet(name, lastname) {
console.log('Hello there ' + name + ' ' + lastname);
}
// invoking
greet('Boby', 'Doe'); // hello there boby doe
greet(); // hello there undefined undefined
greet(name, lastname); // field argument use variable
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