Print out square root of 2 with arbitrary precision

sqrt.go

package main

//
// Print out square root of 2 with arbitrary precision
//

import (
        "fmt"
        "math/big"
)

func main() {
        var n int64 = 2
        a := big.NewInt(5 * n)
        b := big.NewInt(5)

        for i := 0; i < 100000; i++ {

                if a.Cmp(b) >= 0 {
                        a.Sub(a, b)
                        b.Add(b, big.NewInt(10))
                } else {
                        a.Mul(a, big.NewInt(100))
                        b.Sub(b, big.NewInt(5))
                        b.Mul(b, big.NewInt(10))
                        b.Add(b, big.NewInt(5))
                }
        }

        fmt.Println(b)
}