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JavaScript JavaScript Arrays Loop Through Arrays Array Methods

Frank Grillo
Frank Grillo
6,978 Points

How to write an Array Method with Join

Is this how you write an Array method with Join?

script.js
const planets = ['Earth','Mars','Saturn','Mercury','Jupiter','Venus','Uranus','Neptune'];
planets.join(', ');
console.log();

1 Answer

Jeff Muday
MOD
Jeff Muday
Treehouse Moderator 27,586 Points

Yes, you are correct. Thejoin method of the list does return a string that is a joining or concatenation of the list. However, your console.log() is blank, although you may have meant it to be like that.

You may want to capture the output of the join into another variable and log the output.

const planets = ['Earth','Mars','Saturn','Mercury','Jupiter','Venus','Uranus','Neptune'];

// the method of 'join' being captured into a variable
const planetsString = planets.join(', ');

// the original
console.log(planets);

// the joined string
console.log(planetsString);