What type of number is pi?

pi = 3.141592..... ( recurs to infinity).

'pi' is an IRRATIONAL number, which means it CANNOT be converted to a RATIO(Fraction).

Casually, Irrational Numbers are those where the decimals recur to infinity AND there is no regular order in the decimal digits.

Compare

pi = 3.141592.... IRRATIONAL (Irregular order of decimal digits)

but

1/3 = 0.3333.... RATIONAL (Regular order of decimal digits).

NB When given pi = 3.14 , 3.1416 , 22/7 , these are only APPROXIMATIONS and NOT equalities.