/**
 * toFixed
 *
 * @example
 * ```ts
 * toFixed(100)
 * // => 100
 * toFixed(100, 2)
 * // => 100
 * toFixed(3.1415926)
 * // => 3
 * toFixed(3.1415926, 2)
 * // => 3.14
 * ```
 */
export declare function toFixed(num: number, precision?: number): number;