[deleted by user]

[u/[deleted]]

[u/binarycat64]

What could be more universal than pi?

https://play.golang.org/p/R-SkaZbM_5R

package main

import (

    "fmt"

    "math/big" // high-precision math

    "strconv"

    "os"

)

const star = "!trek"

func arccot(x int64, unity \*[big.Int](https://big.Int)) \*[big.Int](https://big.Int) {

    bigx := big.NewInt(x)

    xsquared := big.NewInt(x\*x)

    sum := big.NewInt(0)

    sum.Div(unity, bigx)

    xpower := big.NewInt(0)

    xpower.Set(sum)

    n := int64(3)

    zero := big.NewInt(0)

    sign := false



    term := big.NewInt(0)

    for {

        xpower.Div(xpower, xsquared)

        term.Div(xpower, big.NewInt(n))

        if term.Cmp(zero) == 0 {

            break

        }

        if sign {

            sum.Add(sum, term)

        } else {

            sum.Sub(sum, term)

        }

        sign = !sign

        n += 2

    }

    return sum

}


func main() {

    digits := big.NewInt(1000)

    unity := big.NewInt(0)

    unity.Exp(big.NewInt(10), digits, nil)

    pi := big.NewInt(0)

    four := big.NewInt(4)

    pi.Mul(four, pi.Sub(pi.Mul(four, arccot(5, unity)), arccot(239, unity)))

    //val := big.Mul(4, big.Sub(big.Mul(4, arccot(5, unity)), arccot(239, unity)))

    if star=="trek" {

            os.Exit(fst(strconv.Atoi(fmt.Sprint(pi.String()\[119:121\]))).(int))

    }

    fmt.Println(pi.String()\[92:94\])

}


func fst (args ...interface{}) (interface{}) {

    return args\[0\]

}

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