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Swift Custom Operators

Learn how to create your own operators in Swift.

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Swift lets you create your own customizable operators.

In this article, I will show you how you can easily create your own custom operators in Swift.

Operator Types in Swift

There are five main types of operators in Swift. All of the operators fall in one of these categories:

• Infix Operator — Use between two variables for example1 + 2
• Prefix Operator—Use before a value, for example !true
• Postfix Operator—Use after a value, for example 4! (! means factorial. For example, the factorial of 4 is 4! = 4 * 3 * 2 * 1 = 24)
• Assignment Operator—Update an original value by performing an operation on it. E.g. num += 1 increments num by one.
• Ternary Operator—An operator of two symbols between three expressions. Swift has only one ternary operator called ternary conditional operator (condition ? true_expression : false_expression). This is the only non-customizable operator type on this list!

Every operator type above (except the ternary operator) is customizable. This means you can create a new operator for your needs.