Golang Notes - 9

Converting Numeric Types

var x = 3 // int type
var y = 3.1 // float64 type

x = x * y // mismatched types

x = x * int(y) // works

var x = 3
var y int64 = 2
x = y // cannot assign int64 to int

Converting Numbers to String and vice versa

s := string(99) // converts ascii c char
// go vet fails
s := fmt.Sprintf("%d", 99) // use fmt.Sprintf

s3 := strconv.Itoa(20)

s1 := string(4.3) // cannot convert float to string
s1 := fmt.Sprintf("%f", 4.3)

string to numbers

s1 := "7.1"
f1, _ := strconv.ParseFloat(s1, 64) // bitsize 64 returns float64

i, err := strconv.Atoi("-2")