16进制转换10进制

package main

import (
    "fmt"
    "strconv"
)

func main() {
    hex := "0xC40C5253"
    val := hex[2:]

    n, err := strconv.ParseUint(val, 16, 32)
    if err != nil {
        panic(err)
    }

    n2 := uint32(n)
    fmt.Print(n2)
}

float64 convert to string

package main

import "fmt"
import "strconv"

func FloatToString(input_num float64) string {

    // to convert a float number to a string
    return strconv.FormatFloat(input_num, 'f', 6, 64)
}

func main() {
    fmt.Println(FloatToString(21312421.213123))
}

string hex convert to big.Int

hexToBigInt("0x12a05f200")

func hexToBigInt(hex string) *big.Int {
    n := new(big.Int)
    n, _ = n.SetString(hex[2:], 16)

    return n
}

---

参考:
https://play.golang.org/p/IL76yCuzsMh