Question

Create a for loop with a counter variable i that goes from 0 to 13 in increments of 1. Each time through the for loop, add the following code to the value of the htmlCode variable:

caption_i

where i is the value of the counter variable and caption_i is the value from the captions array with index number i.
After the for loop, change the inner HTML of the document element by the ID gallery to the value of the htmlCode variable.
var captions = new Array(14);
captions[0]="International Space Station fourth expansion [2009]";
captions[1]="Assembling the International Space Station [1998]";
captions[2]="The Atlantis docks with the ISS [2001]";
captions[3]="The Atlantis approaches the ISS [2000]";
captions[4]="The Atlantis approaches the ISS [2000]";
captions[5]="International Space Station over Earth [2002]";
captions[6]="The International Space Station first expansion [2002]";
captions[7]="Hurricane Ivan from the ISS [2008]";
captions[8]="The Soyuz spacecraft approaches the ISS [2005]";
captions[9]="The International Space Station from above [2006]";
captions[10]="Maneuvering in space with the Canadarm2 [2006]";
captions[11]="The International Space Station second expansion [2006]";
captions[12]="The International Space Station third expansion [2007]";
captions[13]="The ISS over the Ionian Sea [2007]";
var htmlCode = "";

Answer 1

To iterate from 0 to 13, concatenate captions to htmlCode, and update an element's innerHTML using JavaScript, a for loop is created, the array captions is looped over by index, and the specified element's innerHTML is set to the accumulated string from the loop.

Step-by-step explanation:

To create a for loop that iterates from 0 to 13 and uses the counter variable i, you can follow this structure. We will also concatenate the corresponding caption from the captions array to the htmlCode variable during each iteration, and finally update the innerHTML of the element with ID 'gallery' with the value of htmlCode.

var captions = new Array(14);
captions[0]="International Space Station fourth expansion [2009]";
// ... other captions ...
captions[13]="The ISS over the Ionian Sea [2007]";
var htmlCode = "";

for (var i = 0; i <= 13; i++) {
htmlCode += 'caption_' + i + captions[i];
}

document.getElementById('gallery').innerHTML = htmlCode;

Note that, after the loop concludes, the htmlCode variable contains all concatenated captions with their respective identifiers, which is then assigned to the innerHTML of the element with ID 'gallery'.