/**
 * @module indicative-rules
 */
/**
 * Tells if `input` is smaller than `comparsionInput`.
 *
 * @example
 * ```js
 * const { is } = require('indicative')
 *
 * if (is.under(20, 10)) {
 * }
 * ```
 */
export declare const under: (input: number, comparsionInput: number) => boolean;