Swift Arithmetic Operators

Arithmetic Operators

Swift 4 supports the four standard arithmetic operators of all number types:

  10 + 20       // equals 30  50 – 30       // equals 20  20 * 3       // equals 60  10.0 / 2.5  // equals 4.0  

Swift 4 arithmetic operators don’t allow values to overflow by default (like the arithmetic operators in C and Objective-C language do).

In Swift 4, we can opt in to value overflow behavior by using Swift’s overflow operators (such as a &+ b).

We can also use addition operator for String concatenation: