/**
 * Is the given argument is a finite Number
 *
 * @param x - Argument to test
 *
 * @returns Whether the argument a finite number or not
 *
 * @example
 * ```ts
 * isNumber(123); // --> true
 * isNumber(Infinity); // --> false
 * isNumber('123'); // --> false
 * ```
 */
export declare function isNumber(x: unknown): x is number;
export default isNumber;