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Functions are one of the most vital parts of programming. Due to how important functions are, there will be a lot of things we don't cover, but remember that functions are going to be vital to any applications you write.
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ECMAScript 6 is the most popular version of JavaScript. There are a lot of important differences between ES5 and ES6, we focus mainly on ES6 in this repo.
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This is a function in
ES6(ECMAScript 6):
const func = (a, b) => {
let nums = a * b;
console.log(nums); // Outputs 250
}
func(25, 10);
- This is a function in
ES5(ECMAScript 5):
function func(a, b) // Everything inside of the parenthesis defines our parameter(s)
{
let nums = a * b;
console.log(nums); // Outputs 250
}
func(25, 10);
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A few things that make up a function are the parameter(s), variables, and our executed code.
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Functions can contain if conditionals, defined variables, multiple parameters, and return statements.
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Functions are usually the same across programming languages with minor syntax changes.