Objective-C Programming: The Big Nerd Ranch Guide

Challenge: counting down

Create a new project (C Command Line Tool) named CountDown and write a program that counts backward from 99 through 0 by 3, printing each number.

If the number is divisible by 5, it should also print the words “Found one!”. Thus, the output should look something like this:

9​9​
9​6​
9​3​
9​0​
F​o​u​n​d​ ​o​n​e​!​
8​7​
.​.​.​
0​
F​o​u​n​d​ ​o​n​e​!​