如果其他条件与数学/大

I'm trying to do comparisons on big numbers but can only get a the string value. So how do you do a condition on a big.Int. Below is the closest to what I have tried.

package main

import (
    "fmt"
    "math/big"
)

func main() {

    dirtyVal := "9446744073709551615"
    dv := big.NewInt(0)
    dv.SetString(dirtyVal, 10)
    userVal := dv.String()

    maxVal := "18446744073709551615"
    mv := big.NewInt(0)
    mv.SetString(maxVal, 10)
    // maxValue := mv.String()

    if userVal > maxVal {
        fmt.Println("True")
    } else {
        fmt.Println("False")
    }

}

You can use func (*Int) Cmp to compare two big.Int http://golang.org/pkg/math/big/#Int.Cmp

if dv.Cmp(mv)>0 {
    fmt.Println("True")
} else {
    fmt.Println("False")
}