export default class Chars {
    /**
     *  check charcode is number or not.
     * @param c
     * @return {boolean}
     */
    static isNumber(c: number): boolean;
    /**
     *  check charcode is number or not.
     * @param c
     * @return {boolean}
     */
    static isDot(c: number): boolean;
    /**
     *  check charcode is number or not.
     * @param c
     * @return {boolean}
     */
    static isSemiColon(c: number): boolean;
    /**
     *
     * @param c
     * @return {boolean}
     */
    static isDecimal(c: number): boolean;
    /**
     *
     * @param c
     * @return {string}
     */
    static toString(c: number): string;
}