January 2018
Intermediate to advanced
678 pages
20h 16m
English
Content preview from Web Programming with HTML5, CSS, and JavaScript
10.9
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10.9 for Loop
In the previous section, we used a while loop to access all the checkboxes in the collection of job skills checkboxes. Using a while loop works OK, but in this section, we use a for loop to access the checkboxes, which leads to a more compact implementation.
FIGURE 10.13 shows the while loop used in the Job Skills web page and a functionally equivalent for loop. Both versions use a counter variable, i, that gets initialized to 0 and gets incremented each time through the loop. With a for loop, the counter mechanism is implemented within the loop’s heading. It’s such a foundational part of a for loop that the counter variable is given a special name—an index variable. Sound familiar? Yep, an index variable is also the name we ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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