/**
 * Rounds a number to a specified number of decimal places.
 *
 * @param num - The number to round.
 * @param decimals - The number of decimal places to round to. Defaults to 0.
 * @returns The rounded number.
 *
 * @example
 * ```typescript
 * roundToDecimal(3.14159, 2); // Returns: 3.14
 * roundToDecimal(3.14159, 0); // Returns: 3
 * roundToDecimal(3.5); // Returns: 4
 * roundToDecimal(3.4); // Returns: 3
 * ```
 */
export declare const roundToDecimal: (num: number, decimals?: number) => number;