htoa (hex to analog) is a function that converts the numeric value of a hex digit (4 bits) to its corresponding value in ascii code. For instance, the digit 'A' has numeric value ten, but has ascii value sixty-five. At the present time this edition of htoa only receives 64-bit groups of bits. The data type (float, signed-int, unsigned-int) is not relevant. The entire group will be converted, 4 bits at as time, to an array of chars where each char contains the ascii value of the starting 4 bits. The resulting array of chars, sometimes called C-string, is not null-terminated.