programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
• Campbell Ritchie
• Liutauras Vilda
• Tim Cooke
• Jeanne Boyarsky
• Paul Clapham
Sheriffs:
• Devaka Cooray
• Ron McLeod
• paul wheaton
Saloon Keepers:
• Tim Moores
• Piet Souris
• Tim Holloway
• Stephan van Hulst
• Carey Brown
Bartenders:
• Al Hobbs
• Frits Walraven
• Scott Selikoff

# Could someone explain how to solve to this problem?

Ranch Hand
Posts: 54
• Number of slices to send:
Optional 'thank-you' note:

I have no idea. I'd really appreciate some insight on how to solve it:

How would you refer to the last element in array A declared as

int[] A = { 1, 3, -4, 7 };

Bartender
Posts: 825
5
• Number of slices to send:
Optional 'thank-you' note:

or more general:

kenny gill
Ranch Hand
Posts: 54
• Number of slices to send:
Optional 'thank-you' note:

but what is it asking and how did you figure out that answer?

Ranch Hand
Posts: 859
• Number of slices to send:
Optional 'thank-you' note:
Java arrays start at index 0, so in your example A[0] == 1

A.length returns the true length, in this case 4, so you must subtract 1 to get the last entry.

TIP: Be careful if length == 0, since you will then try to index A[-1] which will fail.

WP

Java Cowboy
Posts: 16084
88
• Number of slices to send:
Optional 'thank-you' note:
To learn what exactly arrays are and how they work, see Arrays in Oracle's Java Tutorials.

 He got surgery to replace his foot with a pig. He said it was because of this tiny ad: the value of filler advertising in 2021 https://coderanch.com/t/730886/filler-advertising