December 2015
Intermediate to advanced
400 pages
13h 3m
English
Content preview from Swift Programming: The Big Nerd Ranch Guide
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Operations on Integers
Swift allows you to perform basic mathematical operations on integers using the familiar operators + (add), - (subtract), and * (multiply).
Try printing the results of some arithmetic.
Listing 4.8 Performing basic operations
... let numberOfPeople: UInt = 40 let volumeAdjustment: Int32 = -1000 print(10 + 20) print(30 - 5) print(5 * 6)
The compiler respects the mathematical principles of precedence and associativity, which define the order of operations when there are multiple operators in a single expression. For example:
Listing 4.9 Order of operations
... print(10 + 20) print(30 - 5) print(5 * 6) print(10 + 2 * 5) // 20, because 2 * 5 is evaluated first print(30 - 5 - 5) // 20, because 30 ...
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