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JavaScript

Posted by Marc-Oliver Gern
Marc-Oliver Gern
8,747 Points

Why do we add a + to the = for the closing </ol> tag? And why no + for the opening <ol> tag?

I can't seem to figure out the rule for this. Thanks for help.

function printList( list ) {
  var listHTML = '<ol>';
  for ( i = 0; i < list.length; i += 1 ) {
    listHTML += "<li>" + list[i] + '</li>';
  }
  listHTML += '</ol>';
  print(listHTML);
}

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Because the part with the beginning ol tag was likely how you initialized your string to begin with. The += takes the string as it already was and adds something onto the end. Hope that makes sense!

Jacob Mishkin
Jacob Mishkin
23,118 Points

Jennifer Nordell is correct. You're already using the += in your for loop, the last operator The logic and concept is the same as using the += for the HTML.