Question

By default, a real number is treated as a
A) Integer
B) Float
C) Double
D) Long double

Answer 1

By default, a real number is treated as a Double

Answer 2

by default real no. is treated as a float.

option B is the correct answer .

Generally in computer, the real numbers is also refers non complex floating point number .

That contains both ration or irrational numbers. In mathematics the real numbers is generally a value of same quantity that represents a distance with a line.
A real numbers don't have any name before imaginary numbers .
So they got the " real " name of numbers.