合法的实数书写格式分一般格式和科学格式两种。分别描述如下：



一般格式为常见的书写格式，分为整数部分和小数部分两部分，中间分用小数点.分隔。整数部分最开始可能含有正号或负号，之后为不含前导零的数字串；小数部分是由0-9十种字符组成的任意长的字符串。当小数部分为0时，小数部分和小数点可以省略。



科学格式由系数部分和指数部分两部分组成，中间用英文字母E分隔。系数部分为实数书写的一般格式；指数部分为可带有正负号数字串。-Real legitimate form of writing and science at the general form of the two formats. Were described as follows: the general format for writing a common format, divided into integer and decimal part of the Department in two parts, with the decimal point at the middle. Separated. The beginning of an integer may contain some of the most positive sign or negative number, leading zeros after the number of non-string　decimal part is formed by 0-9 scores of the arbitrary character of the string. When the decimal part is 0, the fractional part can be omitted and the decimal point. Scientific format and index by the coefficient part of the Department of the composition in two parts, the middle letter in English E-delimited. Coefficient for the real part of the general form of writing　index part of a sign for the number of strings.