/**
 * Truncates a string to a specified length and optionally appends an ellipsis.
 * @param str - The string to truncate.
 * @param length - The length to truncate to.
 * @param addEllipsis - Whether to append an ellipsis. Defaults to true.
 * @returns The truncated string.
 */
export declare function truncateString(str: string, length: number, addEllipsis?: boolean): string;
/**
 * Truncates a number to a specified number of decimal places.
 * @param num - The number to truncate.
 * @param decimals - The number of decimal places to keep.
 * @returns The truncated number.
 */
export declare function truncateNumber(num: number, decimals: number): number;
/**
 * Truncates a string or number based on the type and provided length/decimal places.
 * @param input - The input to truncate (string or number).
 * @param lengthOrDecimals - The length for strings or number of decimal places for numbers.
 * @param addEllipsis - Whether to append an ellipsis for strings (optional).
 * @returns The truncated string or number.
 */
export declare function truncate(input: string, length: number, addEllipsis?: boolean): string;
export declare function truncate(input: number, decimals: number): number;