Chapter 4. Control Structures
Working with data is difficult if you have to do it in a completely linear manner, which makes control structures a vital part of any programming language. On the surface, the control structures in Swift are the same as those in Objective-C, but once you start to dig a little deeper you will begin to find that they go beyond what was possible before in a number of ways.
General Changes
Like Objective-C, Swift has four main control structures:
for and for-in loops
while and do-while loops
if conditional blocks
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