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JavaScript JavaScript Arrays Loop Through Arrays Loop Through an Array

karan Badhwar
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karan Badhwar
Web Development Techdegree Graduate 18,135 Points
Posted by karan Badhwar
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karan Badhwar
Web Development Techdegree Graduate 18,135 Points

empty String

let items = '' V/S let items;

Why the second declaration adds Undefined to the <li> Tags and on the other hand, the first one have an empty space, so same as it should add some empty space, but it doesn't !!

1 Answer

Jason Larson
Jason Larson
8,359 Points

The second declaration adds Undefined because that is the default value whenever you use let to declare a variable and don't initialize it. The first declaration doesn't add a space at the beginning because it's not a space. It's an empty string, which is a quote followed by a quote. A space would be a quote followed by a space, followed by a quote. There is no space in the declaration, which is why you don't see any space at the beginning of the string.

Note that even if you declare it with a string, and there was a space at the beginning of the string, once it's converted to HTML, the extra space won't matter.