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JavaScript JavaScript Basics (Retired) Storing and Tracking Information with Variables Using String Methods

Posted by Brian Goold
Brian Goold
696 Points

Question about toUpperCase

Why does this work? var id = "23188xtr"; var lastName = "Smith"; var upID = id.toUpperCase(); var upLast = lastName.toUpperCase(); var combo = upID + '#' + upLast; var userName = combo;

But this does not? var id = "23188xtr"; var lastName = "Smith"; var combo = id + '#' + lastName; var upper = combo.toUpperCase(); var userName = upper;

1 Answer

Damien Watson
Damien Watson
27,419 Points
Damien Watson
Damien Watson
27,419 Points

Hi Brian,

It's not a question of whether it works or not, but whether it passes the challenge marking criteria.

Both code blocks should give the same response, but the challenge 'evaluater' is looking for lastName.toUpperCase() to be called. If you look at the error.

Error

Bummer! Did you call the toUpperCase() on lastName?

If you wanted to do the second option, as stupid as it sounds, it will pass by adding toUpperCase to the end of lastName :

var id = "23188xtr";
var lastName = "Smith";
var combo = id + '#' + lastName.toUpperCase();
var upper = combo.toUpperCase();
var userName = upper;
Brian Goold
Brian Goold
696 Points

Ah yes, this makes sense now. Thank you kindly!