Function toExponential

packages/effect/src/BigDecimal.ts:1022–1039

(n: BigDecimal)

 * @category conversions
 */
export const toExponential = (n: BigDecimal): string => {
  if (isZero(n)) {
    return "0e+0"
  }

  const normalized = normalize(n)
  const digits = `${abs(normalized).value}`
  const head = digits.slice(0, 1)
  const tail = digits.slice(1)

  let output = `${isNegative(normalized) ? "-" : ""}${head}`
  if (tail !== "") {
    output += `.${tail}`
  }

  const exp = tail.length - normalized.scale
  return `${output}e${exp >= 0 ? "+" : ""}${exp}`
}

/**
 * Converts a `BigDecimal` to a `number`.