When i tried to print .txt format,data will be coming without space between each row but when 
I tried to print .xls format mean ,it gives gap of each row.what is the reason behind this?

Why we using double dot in cache?what is the use of it?

Explain data expression and selection expression?

Major difference between GOTO and do command?

After printing the output in .xls format,the output which i got after every entry blank space exist.Is there any error in .xls file or code error?

Haribabu, Vandhana 392 yes

Zast, Donna C 445 yes

Mast, EPrescribe Unique 598 yes

Qa,Donna Nurse 638 yes

Master,Dr. Mary 774 yes

What is a major difference between $case and $select?