Question

Define irrational number in terms of decimal expression..???

Answer 1

A number that cannot be expressed as a ratio between two integers and is not an imaginary number. If written in decimal notation, an irrational number would have an infinite number of digits to the right of the decimal point, without repetition. Pi and the square root of 2 (√2) are irrational numbers.

Answer 2

the number whuch is not rational number called irrational number.
second defination is
the number which is not repeating nor terminating us called irrational number.