numberparse.go

package main

//
// The built-in package strconv provides 
// number parsing.
//
import (
    "fmt"
    "strconv"
)

func main() {

	// 
	// With ParseFloat, this 64 tells how many bits
	// of precision to parse.
	//
    f, _ := strconv.ParseFloat("1.234", 64)
    fmt.Println(f)

	//
	// FOr ParseInt, the 0 means infer the base from
	// the string. 64 requires that the result fit 
	// in the64 bites. 
	//
    i, _ := strconv.ParseInt("123", 0, 64)
    fmt.Println(i)

	// ParseInt will recognize hex-formatted numbers.
    d, _ := strconv.ParseInt("0x1c8", 0, 64)
    fmt.Println(d)

	// A ParseUint iss also available
    u, _ := strconv.ParseUint("789", 0, 64)
    fmt.Println(u)

	//
	// Atoi is a convenience funciton for basic
	// base-10 int parsing.
	//
    k, _ := strconv.Atoi("135")
    fmt.Println(k)

	// Parse functions return an error on bad input.
    _, e := strconv.Atoi("wat")
    fmt.Println(e)

}