Question

what are irrational numbers and give their examples

Answer 1

Any number which is not irrational number or which cannot be written in p/q form are known as is rational numbers.
Every point on the number line represent rational or irrational numbers.
Examples are:0.12345678 etc

Answer 2

numbers that cannot be written in a ratio form or in p/q form are called irrational  numbers .
 example1 ; value of pi=3.1415
               2;  7854376543