It is a number that cannot be written in the form p/q
In other words it cannot be written exactly as a fraction.
This also means that it cannot be written exactly as a terminating or a recurring decimal. The digits would keep going for ever and they would never form a pattern.
Examples or irrational numbers are
$$\pi,\;\;\sqrt3,\;\;e,\;\;5\sqrt7$$
It is a number that cannot be written in the form p/q
In other words it cannot be written exactly as a fraction.
This also means that it cannot be written exactly as a terminating or a recurring decimal. The digits would keep going for ever and they would never form a pattern.
Examples or irrational numbers are
$$\pi,\;\;\sqrt3,\;\;e,\;\;5\sqrt7$$