/**
* 判断是否是合法金额
* 只能是数字,小数点后只能保留两位或一位
* isAmount(0) => true
* isAmount('01') => false
* isAmount('1.') => true
* isAmount('1.1') => true
* isAmount('1.12') => true
* isAmount('1.123') => false
*/
declare function isAmount(val: string): boolean;
export { isAmount };