CODEWITHSUNDEEP
javascriptecmascript-6arrow-functions
Steve Waters
Steve Waters

Reputation: 3548

const "variable" undefined in following function

Beginner here. Why userName is undefined in the function and how to make the function to have it as John Doe and not undefined?

const userName = 'John Doe';
console.log(userName);
const loggedInUser = (userName) => console.log('Logged in user is: ' + userName);
loggedInUser();

Console output:

index.js:22 John Doe
index.js:23 Logged in user is: undefined

Upvotes: 0

Views: 3989

Answers (1)

Daniel
Daniel

Reputation: 11182

const loggedInUser = (userName) => console.log('Logged in user is: ' + userName);

defines a function named loggedInUser that takes a single argument.

After defining this function you call it on the next line loggedInUser();, but you don't provide the argument.

Try loggedInUser(userName);

Upvotes: 1

Related Questions