A number 's' is called irrational,if it cannot be written in the form p/q,where p and q are integers and q is not equal to 0.

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Important Points

(i) Irrational numbers are real numbers.

(ii) Every real number represented by a unique ponit on the number line.So irrational numbers can be represented on number line.

(iii) The set of irrational numbers is the complementary of the set of rational number.

(iv) Decimal expansion of irrational number is non-terminating non-recurring.

(v) Pi is an irrational number.