Binary number

(编). Sequence A001969 (Evil numbers: numbers with an even number of 1's in their binary expansion). The On-Line Encyclopedia of Integer Sequences. OEIS

integer（32或64位） double（64位IEEE 754浮点数） decimal128（128位IEEE 754-2008浮点数；Binary Integer Decimal（英语：Binary Integer Decimal）变体），适合作为任意精度为34个十进制数字的数字载体，最大值近似106145 date（整数，自UNIX时间的毫秒数)

(编). Sequence A000069 (Odious numbers: numbers with an odd number of 1's in their binary expansion). The On-Line Encyclopedia of Integer Sequences. OEIS

Foundation.  Sloane, N.J.A. (编). Sequence A002720 (Number of partial permutations of an n-set; number of n X n binary matrices with at most one 1 in each row and

采用本地的number类型做指数或对数运算，与标准的浮点数性能可能会相差50倍。好在Oracle10g中增加了高效的浮点类型binary_float,binary_double，从而弥补了浮点数性能的问题。 variable_name number[([P][, S])] = 0; NUMBER可选指定precision