Different types of values exist such as character string, date, decimal, and so on.
存在不同类型的值，如字符串、日期(date)、小数(decimal)等。
Certain useful types, like decimal and string, are built in.
某些有用的类型，如小数的和字符串类型，是内置的。
Determine whether the string representation of a number includes a decimal point symbol.
判断数值的字串表示是否包含小数点符号。
Determine whether the string representation of a number includes a decimal point symbol.
判断数值的字串表示是否包含小数点符号。
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