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Start your free trialMahfuzur Rahman
3,204 Pointspurpose of html += '<div>' + i '</div>' ;
I understand what div is. But in the for loop how is the variable html changing? first html was an empty string. I don't understand how are we putting the values of 1 to 10 in it.
from my understanding variable html becomes == html+<div>+1 </div>== (when i=1)
1 Answer
Matthew Long
28,407 PointsYou can always write out what a loop would be every time it runs.
var html = "";
for (var i = 0; i <= 10; i += 1) {
html += "<div>" + i + "</div>";
}
When the above loop runs the first time the html is:
<div>1</div>
After it is run 10 times the html is:
<div>1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<div>5</div>
<div>6</div>
<div>7</div>
<div>8</div>
<div>9</div>
<div>10</div>
The reason it is a new <div>
each time the loop is run is due to the +=
operator. It if was simply =
then the html would be the following after being looped over 10 times:
<div>10</div>
Hopefully this clears things up for you.
Nicholas Wallen
12,278 PointsThat does help, A LOT.
Honestly, this was a very poorly taught video.
Jake Cooper
Courses Plus Student 56,854 PointsJake Cooper
Courses Plus Student 56,854 Points+=
is for concatenation
=
is for assignment