deleting blank lines

[Masrur Hossain]

HI guys
       One program gives me parameter values as output values separated 
by blank lines.
while I  use "M-x replace-string" to replace parameter names , to delete 
the blank lines I go on using "C-k" to delete the blank lines.

Wondering how we can kill all blank lines at a time .


thanks in advance


Masrur