Go contains basic numeric types that can represent sets of either integer or floating-point values. There a different types depending on the size of value you require and the architecture of the computer where the application is running (e.g. 32-bit and 64-bit).
For the sake of this exercise you will only be dealing with:
-
int: e.g.0,255,2147483647. A signed integer that is at least 32 bits in size (value range of: -2147483648 through 2147483647). But this will depend on the systems architecture. Most modern computers are 64 bit, thereforeintwill be 64 bits in size (value rate of: -9223372036854775808 through 9223372036854775807). -
float64: e.g.0.0,3.14. Contains the set of all 64-bit floating-point numbers.
For a full list of the available numeric types and more detail see the following resources:
- Go builtin type declarations
- Digital Ocean - Understanding Data Types in Go
- Arden Labs - Understanding Type in Go
Go supports the standard set of arithmetic operators of +, -, *, /
and % (remainder not modulo).
In Go, assignment of a value between different types requires explicit
conversion. For example, to convert an int to a float64 you would need to
do the following:
var x int = 42
f := float64(x)
fmt.Printf("x is of type: %s\n", reflect.TypeOf(x))
// Output: x is of type: int
fmt.Printf("f is of type: %s\n", reflect.TypeOf(f))
// Output: f is of type: float64