i/o to several floats

iosample.go

package main

import (
	"bufio"
	"fmt"
	"strconv"
	"strings"
)

func main() {
	str := []byte("W=00.4 103 +20.4\r\n")
	reader := bufio.NewReader(strings.NewReader(string(str)))
	line, _ := reader.ReadString('\n')
	if line[:1] == "W" {
		WS, err := strconv.ParseFloat(line[2:6], 64)
		if err != nil {
		} else {
			fmt.Println(WS)
		}

		WD, err := strconv.ParseFloat(line[7:10], 64)
		if err != nil {
		} else {
			fmt.Println(WD)
		}

		WT, err := strconv.ParseFloat(line[11:16], 64)
		if err != nil {
		} else {
			fmt.Println(WT)
		}

	}

}