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export function bigIntAbs(n: bigint): bigint {  if (n >= 0n) {    return n;  }  return n * -1n;}
export function getDecimals(n: number | string): number {  if (isNaN(n as any)) {    throw new Error("InvalidNumber");  }  const [preDec, postDec] = _splitString(n.toString(), ".");  return postDec.length;}
export function extractExp(n: string): [string, number] {  const [mul, expStr] = _splitString(n, "e");  if (expStr === "") {    return [n, 0];  }
  const exp = parseInt(expStr, 10);  if (isNaN(exp)) {    throw new Error("InvalidNumber");  }  return [mul, exp];}
export function countTrailingZeros(n: bigint, upTo: number): number {  if (n === 0n) {    return 0;  }
  let count = 0;  let c = n < 0 ? n * -1n : n;  while (c % 10n === 0n && count < upTo) {    count += 1;    c = c / 10n;  }  return count;}
function _splitString(input: string, char: string): [string, string] {  const pos = input.indexOf(char);  if (pos === -1) {    return [input, ""];  }  const after = input.substr(pos + 1);  if (after.indexOf(char) !== -1) {    throw new Error("InvalidNumber"); // Multiple occurences  }  return [input.substr(0, pos), after];}