翻译"Numeric" is a term that can refer to either an integer (a whole number) or a floating-point number (a number with a fractional part). The exact definition of "numeric" can vary depending on the context and the programming language being used. As for length, the concept of length is not directly applicable to numeric data types. However, you can usually specify the number of digits or the range of values that a numeric value can take. For example, in some programming languages, you can specify the number of bytes used to store a numeric value, which determines the maximum and minimum values that the value can represent.

"数值型"是一个术语，可以指整数（整数）或浮点数（具有小数部分的数字）。 "数值型"的确切定义取决于上下文和使用的编程语言。 至于长度，长度的概念不能直接应用于数值数据类型。 但是，通常可以指定数值的位数或该数值可以采用的值的范围。例如，在某些编程语言中，可以指定用于存储数值的字节数，这确定了该值可以表示的最大和最小值。