Question

a) Explain the concepts of Fixnum and Bignum in Ruby

b) Explain the concepts of Float::EPSILON, Float::MIN, and Float::MAX in Ruby

c) Explain and exemplify the inclusive range and exclusive range in Ruby

d) Describe the concept of dynamic typing in Ruby

e) Explain the meaning of variables and the role and applicability of the following program:

def trace

return unless $trace

p @a / p @b / p @c

end

f) Show a short program that defines a hash and prints its values

g) Show a short program that opens a text file and displays its lines and index

Answer 1

a) Fixnum and Bignum are classes to store integer values.

    Fixnum is used to store values for -2⁶² to 2⁶² - 1 and values greater or lesser than this range will be stored in

    Bignum class.

b) Float::EPSILON

    The difference between 1 and the smallest double-precision floating point number greater than 1.

    Defaults to 2.2204460492503131e-16.

    Float::MIN

    The smallest positive normalized number in a double-precision floating point.

    Defaults to 2.2250738585072014e-308.

    Float::MAX

    The largest possible number in a double-precision floating point number.

    Defaults to 1.7976931348623157e+308.

Note: Please ask other in another question.