How to trim leading 0's for float64?

[Yo_94 (Hamxa)]

I have a field for the amounts and the type of the field is float64, so is it possible if I can trim the leading 0’s?

For example: if Amount = 0.00 then delate the leading 0s so the amount only shows as 0 but if the Amount has cents then show two decimals.

[GonzaSaya (Gonzalo Sayago)]

package main

import (
	"fmt"
	"math"
)

func main() {
	var test float64 = 0.0
	fmt.Println(Float2String(test))
	test = 0.1
	fmt.Println(Float2String(test))
}

func Float2String(xF float64) string {
	if math.Trunc(xF) == xF {
		return fmt.Sprintf("%.0f", xF)
	} else {
		return fmt.Sprintf("%.2f", xF)
	}
}

[GonzaSaya (Gonzalo Sayago)]

I was reading the documentation and I didn’t found another option.
https://play.golang.org/p/nZtaQ3Wq5Xf

[NobbZ (Norbert Melzer)]

@Yo_94

but if the Amount has cents

Cents as in currency? Please stop right here and search for a proper money library! (Or fixed decimals at least)

Floating point numbers are not the right tool for anything that needs to be exact, and money needs to be exact!

Always remember that with floating point not even the most trivial mathematical laws hold… (x + y) + z is not necessarily the same as x + (y + z)!