Utilizing Go constants
Constants provide values that are set at compile time and cannot change. This is in contrast to variables, which store values that can be set at runtime and can be altered. This provides types that cannot accidentally be changed by a user and are allocated for use in the software on startup, providing some speed advantages and safety over variable declarations.
Constants can be used to store the following:
- Booleans
- Runes
- Integer types (
int,int8,uint16, and so on) - Floating-point types (
float32/float64) - Complex data types
- Strings
In this section, we will discuss how to declare constants and common use in your code.
Declaring a constant
Constants are declared using the const keyword, as illustrated in the following code snippet:
const str = "hello world" const num = 3 const num64 int64 = 3
Constants are different from variable types in that they come in two flavors, as follows:
- Untyped constants...