Find decimal count from shopspring decimal library-CodePudding

I am using github.com/shopspring/decimal for decimal related operations in golang instead of float for actual precision. I have a requirement to find the decimal count for a decimal library value.

eg:-

price := decimal.NewFromFloat(0.00355)
fmt.Println("Price:", price)    // Price:0.00355

This is how I use the decimal. So now I want to count the number of decimals from the same decimal. In the above example the decimal count would be 5 since there are five decimal points.

Checked the docs but couldn't find the right operation for this. Can somebody help with this? Thanks in advance.

CodePudding user response：

Wouldn't you just use decimal.Exponent() and ask the number what its scale is?

https://goplay.tools/snippet/9Y6BP1dcOuA

package main

import (
    "fmt"

    "github.com/shopspring/decimal"
)

func main() {
    x := decimal.NewFromFloat(123.456789)
    s := x.Exponent()

    fmt.Printf("decimal value %v has a scale of %v\n", x, s)

}

Which yields

decimal value 123.456789 has a scale of -6

CodePudding user response：

You can convert decimal value to string, then count number of char after point ..

0.00355 => "0.00355" => count=5