Go constants

In Go, a constant is a value with a literal representation such as a string of text, Boolean, or numbers. The value for a constant is static and cannot be changed after initial assignment. While the concept they represent is simple, constants, however, have some interesting properties that make them useful, especially when working with numeric values.

Constant literals

Constants are values that can be represented by a text literal in the language. One of the most interesting properties of constants is that their literal representations can either be treated as typed or untyped values. Unlike variables, which are intrinsically bound to a type, constants can be stored as untyped values in memory space. Without that type constraint, numeric constant values, for instance, can be stored with great precision.

The followings are examples of valid constant literal values that can be expressed in Go:

"Mastering Go" 
'G' 
false 
111009 
2.71828 
94314483457513374347558557572455574926671352...