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JavaScript JavaScript Functions Arrow Functions Create Functions Using Arrow Syntax

How do you execute this (what I call an anonymous arrow function)? () => a + b + 100;

Please elaborate further, thank you!

2 Answers

Trevor Woodman
PLUS
Trevor Woodman
Courses Plus Student 13,354 Points

That is just an arrow function without arguments. To make it do anything, the variables a and b have to exist:

const a = 5;
const b = 5;
() => a + b + 100;

Although written like this, the function would serve no purpose as you're not storing it anywhere or doing anything with the return value. It would add a, b, and 100 in the background and then do nothing with it.

A more logical solution would be to store the return value of the function in a variable (in our case 110) and then do something with it (call it):

const a = 5;
const b = 5;
const c = () => a + b + 100;
console.log(c()); // 110

"the function would serve no purpose as you're not storing it anywhere or doing anything with the return value. It would add a, b, and 100 in the background and then do nothing with it."

  • solved! Thanks a lot!