04-constants/

Constants - Language Syntax

Constants are a way to create a named identifier who's value can never change. They also provide an incredible amount of flexibility to the language. The way constants are implemented in Go is very unique.

Notes

• Constants are not variables.
• They existing only at compilation.
• Untyped constants can be implictly converted where typed constants and variables can't.
• Think of untyped constants as having a Kind, not a Type.

Links

https://golang.org/ref/spec#Constants

http://blog.golang.org/constants

http://www.goinggo.net/2014/04/introduction-to-numeric-constants-in-go.html

Code Review

Declare and inialize constants (Go Playground)

Parallel type system (Kind) (Go Playground)

Exercises

Exercise 1

Part A: Declare an untyped and typed constant and display their values.

Part B: Multiply two literal constants into a typed variable and display the value.

Template (Go Playground) | Answer (Go Playground)

All material is licensed under the Apache License Version 2.0, January 2004.