how to get around blank line

[alan12]

When I read plain text file such as:
=======
line1 aaaaaa;
line2 bbbbbb;

line4 dddddd;
=======

who can I write code to skip line3(which is blank) and read line4 instead?

 

[raider2001]

One way to skip a blank line:

while(<F>) {
    next unless (/\S/); # skip unless line has a non-white space character 
    # do something
}