Float can contain up to seven digits in total, not just following the decimal point â so, for example, 321.1234567 cannot be stored in float because it has 10 digits. If greater precisionâmore digitsâis necessary, the double type is used.
This animal may have sharp spines, but it isn't a porcupine! It's one of two types of primitive egg-laying mammals, or monotremes. (The other is the duck-billed platypus.).
Through time three major groups of mammals evolved: Prototherians - lay eggs (eg. platypuses and echidnas) Metatherians - young develop in pouches (marsupials such as kangaroos and koalas) Eutherians - give birth to well-developed offspring (includes many familiar species such as rabbits, elephants, horses, and humans) The platypus is a prototherian.