Package bigfloat provides the implementation of a few additional operations (exponentiation, basic elementary functions) for the standard library big.Float type.
This package is a fork of [https://github.com/ALTree/bigfloat]. The general API was changed to use the output argument convention of math/big, and there are a number of other changes besides.
With Go version 1.10 or higher installed:
go get github.com/zephyrtronium/bigfloat
package main
import (
"fmt"
"math/big"
"github.com/zephyrtronium/bigfloat"
)
// In this example, we'll compute the value of the
// trascendental number 2 ** √2, also known as
// the Gelfond–Schneider constant, to 1000 bits.
func main() {
// Work with 1000 binary digits of precision.
const prec = 1000
two := big.NewFloat(2).SetPrec(prec)
sqrtTwo := new(big.Float).Sqrt(two)
// Compute 2 ** √2
// Pow uses the first argument's precision, or the greater of the others'
// if the first's is zero like here.
gsc := bigfloat.Pow(new(big.Float), two, sqrtTwo)
// Print gsc, truncated to 60 decimal digits.
fmt.Printf("gsc = %.60f...\n", gsc)
}outputs
gsc = 2.665144142690225188650297249873139848274211313714659492835980...