Arrow Function
Arrow functions are a shorter way to write functions in JavaScript. They are especially handy for small, simple functions.
Here's how you create and use them:
Basic Syntax :
const variableName = (parameters) => {
// function code
};
const
declares a constant (unchanging) variable.variableName
is the name you give to your function.- parameters are the values that your function can take as input.
=>
is the arrow that separates the function's parameters and its body.{}
contains the actual code that the function will execute.
Let's create a simple arrow function that adds two numbers:
const addNumbers = (a, b) => {
return a + b;
};
const result = addNumbers(5, 3);
console.log(result);
Arrow Functions with No Parameters​
If your function doesn't take any parameters, you still need parentheses, but they will be empty:
const greet = () => {
return "Hello, World!";
};
console.log(greet());