Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Objective-C Basics (Retired) Advanced Objective-C Dynamic Typing

Posted by Sam Gellman
Sam Gellman
Courses Plus Student 409 Points

How do I initialize a variable to nil?

I'm not able to figure out this first step of the challenge and am stuck.

2 Answers

Ricardo Hill-Henry
Ricardo Hill-Henry
38,442 Points
Ricardo Hill-Henry
Ricardo Hill-Henry
38,442 Points

You simply create a variable and set it equal to nil. Nothing tricky.

variableType variableName = nil;

Brenden Konnagan
Brenden Konnagan
16,858 Points
Brenden Konnagan
Brenden Konnagan
16,858 Points

You don't have to set it to anything. The process of allocating and initializing a variable sets it to nil (no value) until you set some other value to it.