number parsing _ golang

Parsing numbers from strings is a basic but common task in many programs; here's how to do it in Go

package main

import (
    "fmt"
    "strconv"
)

func main() {

    f, _ := strconv.ParseFloat("1.234", 64)
    fmt.Println(f)

    i, _ := strconv.ParseInt("123", 0, 64)
    fmt.Println(i)

    d, _ := strconv.ParseInt("0x1c8", 0, 64)
    fmt.Println(d)

    u, _ := strconv.ParseUint("789", 0, 64)
    fmt.Println(u)

    k, _ := strconv.Atoi("135")
    fmt.Println(k)

    _, e := strconv.Atoi("wat")
    fmt.Println(e)
}

1.234
123
456
789
135
strconv.ParseInt: parsing "wat": invalid syntax

总结 : 

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