In this Swift 3 Tutorials : Swift Basics lesson we will tell you how to create a constant in Swift

Before you start please Create or open a Swift Playground .
For this lesson use a playground titled 1.Swift 3 Tutorials by the : Swift Basics

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To create or declare a constant in Swift use let keyword. The main difference between constants and variables is that you can’t change a value of a constant in the future.

Open a swift playground and type:

Human gender and eye color usually don’t change in the future and are the good examples of constants.

As a result you will see the following in your playground:

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