Basic types in Golang

了解 Golang 有哪些資料型態. 官網上的 Basic types 列出了多種的型態.

Variables

下面列出資料類型, 其中可分為 Booleans、Numeric Types、Complex Numbers、Strings

bool

string

int  int8  int16  int32  int64
uint uint8 uint16 uint32 uint64 uintptr

byte // alias for uint8

rune // alias for int32
     // represents a Unicode code point

float32 float64

complex64 complex128

string

變數宣告與印出

package main
import "fmt"

func main() {
  i := 100
  ui := uint(i)
  f := 1.425
  b := true
  s := "Hello World"
  c := 3 + 4i
  fmt.Printf("%T, %T,%T,%T,%T,%T", i, ui, f, b, s, c)
}

Booleans

Booleans have two possible values true and fales.

Numeric Types

Signed Integers

Unsigned Integers

Float

float64 is the default float type. When you initialize a variable with a decimal value and don’t specify the float type, the default type inferred will be float64.

Complex Numbers

References

• Basic types
• Golang Basic Types, Operators and Type Conversion