Getting Rid of Vlookup #N/A Error Message

Greetings Evreryone,

How can you write a VLOOKUP formula to prevent it from giving you an #N/A error message when it is unable to find the lookup value.

For example: If i am looking for let say number 101 in column 'A" but there is no number one, how do i get the vlookup formula to return Zero (0) instead of #N/A.