Number can be of many digits. It csn be a 1-digit , 2-digit or any-digit numbers. So it is very important to compare these numbers to find the smallest or greatest among these numbers.

How to compare large numbers

Steps:
1) Count the number of digit in each number. The number with less number of digit is smaller number.
e.g Compare 654763 and 76456 .
In these number , 654763 has 6 digit and 76456 has 5 digit . So 76456 is smaller number than 654763 .

2) If the numbers consist of same number of digits, compare value of each digit of both the numbers starting from left . The number which has digit with greater value is greater.
e.g Compare 2354 and 2345 .
Since both the numbers are 4-digit number, compare value of each digit starting from extreme left.
first digit of 2354 is 2 and 2345 is also 2. So both are same. Now move to next digit.
2nd digit of 2354 is 3 and 2345 is also 3. So both are same. Now move to next digit.
3rd digit of 2354 is 5 and 2345 is also 4 . Since 5 is greater than 4 , so 2354 will be greater than 2345 .