Be careful with using this form of <code>if</code>. It's bug-prone, especially when used in a multiple-developer project. Apple had a critical cryptography bug that would not have happened if they had used the full form of <code>if</code>: http://arstechnica.com/security/2014/02/extremely-critical-crypto-flaw-in-ios-may-also-affect-fully-patched-macs/