/**
 * Return the integral and fractional parts of the given number. Both parts
 * have the same sign as the input.
 *
 * If `literal` is set to `true` the fractional part is reinterpreted by reading
 * the decimals in the base 10 string representation of `x` (safe if `x` is a
 * number literal or if its value is deterministic, and if its representation
 * matches exactly the value to be used).
 *
 * @param x - The input number.
 * @param literal - Whether to read `x` as a base 10 literal (default: `false`).
 * @returns A tuple `[ipart, fpart]`, respectively the integral and fractional
 * parts of `x`, or `[NaN, NaN]` if `x` is not a finite number.
 */
export declare function modf(x: number, literal?: boolean): [number, number];
/**
 * Return the integral part of the given number.
 *
 * @param x - The input number.
 * @returns The integer part of `x`.
 */
export declare const ipart: (x: number) => number;
/**
 * Return the fractional part of the given number.
 *
 * @param x - The input number.
 * @param literal - Whether to read `x` as a base 10 literal (default: `false`).
 * @returns The fractional part of `x`.
 * @see {@link modf} for further information.
 */
export declare const fpart: (x: number, literal?: boolean) => number;