Theory:

Real numbers are the numbers which include both rational and irrational numbers. A real number is denoted by "\(R\)". 
Important!
Every real number is either rational or irrational.
German mathematicians, Cantor and Dedekind, discovered that 'Corresponding to every real number, there is a point on the real number line, and corresponding to every point on the number line, there exists a unique real number'.
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