All numbers that are not rational are considered irrational. An irrational number can be written as a decimal, but not as a fraction.

A number ‘s’ is called irrational, if it cannot be written in the form ^p/_q, where p and q are integers and q ≠ 0.

Some examples are: √2 , √3, √15, π, 0.10110111011110…

An irrational number has endless non-repeating digits to the right of the decimal point.

Here are some irrational numbers:

√3 = 1.732050…

π = 3.141592…

These irrational numbers do not exists on the number line. There infinitely many irrational numbers between two whole numbers such as 2 and 3 or 3 and 4 etc.