Ordering mean arranging the number in ascending or descending order . It is denoted by sumbol > or < . The numbers which are written toward the mouth of the symbol are greater number and the number which are written towards the tail are smaller numbers.
Ascending order means arranging numbers in increasing manner . Smaller number comes first and Greater number comes after .
example : 56 < 65< 72 < 80 .

Descending order means arranging numbers in decreasing manner. Greater number comes first and smaller number comes afte.
example : 80>72>65>56 .