Go Data Types

Every value in a program has a data type, and this idea matters a lot: the type tells Go what kind of value a variable holds and how much space it takes up.

Types in Go are static, so a variable keeps the type you give it and will never accept data of another type later.

The language has three basic groups of types:

bool - a value that is either true or false
Numeric - whole numbers (integers), floating-point numbers, and complex numbers
string - a run of characters, such as a piece of text

Example

Here is one variable from each group, with the numeric group shown as both an integer and a float:

Declare variables of type bool, int, float32, and string. Print each with a label.

> Output: Go program and captured output

Prompt

Declare variables of type bool, int, float32, and string. Print each with a label.

Output: Go program and captured output

package main
import ("fmt")

func main() {
  var a bool = true
  var b int = 5
  var c float32 = 3.14
  var d string = "Hi!"

  fmt.Println("Boolean: ", a)
  fmt.Println("Integer: ", b)
  fmt.Println("Float:   ", c)
  fmt.Println("String:  ", d)
}