/**
 * 数组内元素求和
 *
 * ```ts
 * import { sum } from 'sunny-js'
 * console.log(sum([1, 2]))
 * // => 3
 * ```
 *
 * @category 数字
 */
export declare function sum(input: number[]): number;
/**
 * 返回百分数
 *
 * ```ts
 * import { percent } from 'sunny-js'
 * console.log(percent(1, 2))
 * // => '50%'
 * ```
 *
 * @param numerator 分子
 * @param denominator 分母
 * @param fixedPoint 小数位精度
 * @category 数字
 */
export declare function percent(numerator: number | string, denominator: number | string, fixedPoint?: number): string;
/**
 * 检查输入是否像数字
 *
 * ```ts
 * import { isNum } from 'sunny-js'
 * isNum(1) // true
 * isNum('1') // true
 * isNum('1.1%') // true
 * isNum('1x') // true
 * ```
 *
 * @category 数字
 */
export declare function isNum(input: string | any): boolean;
/**
 * 数字千位分隔符
 *
 * ```ts
 * import { thousandsSeparators } from 'sunny-js'
 * console.log(thousandsSeparators(1234567))
 * // => 1,234,567
 * console.log(thousandsSeparators(1234567.1234567))
 * // => 1,234,567.123
 * console.log(thousandsSeparators(1234567.1234567, { maximumFractionDigits: 2 }))
 * // => 1,234,567.12
 * ```
 *
 * @deprecated 可以使用[Number.prototype.toLocaleString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString)替代
 * @see {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString Number.prototype.toLocaleString()}
 * @param num 数字
 * @param opts 数字格式化选项
 * @category 数字
 */
export declare function thousandsSeparators(num: number | string, opts?: Intl.NumberFormatOptions): string;
/**
 * 生成范围随机数
 *
 * ```ts
 * import { randInRange } from 'sunny-js'
 * // 0-10范围的随机数
 * console.log(randInRange(0,10))
 * ```
 *
 * @param min 最低数
 * @param max 最高数
 * @category 数字
 */
export declare function randInRange(min: number, max: number): number;
/**
 * 生成id
 *
 * ```ts
 * import { uniqId } from 'sunny-js'
 * uniqId('id')
 * // => 'id0'
 * ```
 *
 * @param prefix id前缀
 * @category 数字
 */
export declare const uniqId: {
    (prefix?: string): string;
    /**
     * @ignore
     */
    _incrementId?: number;
};