将float转换为字符串而不更改float

Question

I am converting a float to a string like this in Golang

a := strconv.FormatFloat(-3.6739403974420544e-15, 'f', -1, 64)

It's giving me this as output

-0.0000000000000036739403974420544

However, I would rather have this as output

   "-3.673940397442059e-15"

In the title to this question, I said "without altering" the float. By "altering" I am referring to the addition of the 0s in place of the e-15. is there a way to do it?

Answer 1

I think you are just using the wrong format specifier:

package main

import (
    "fmt"
    "strconv"
)

func main() {
    fmt.Println(strconv.FormatFloat(-3.6739403974420544e-15, 'e', -1, 64))
}

Output:

-3.6739403974420544e-15

The docs show the other formats as well.