Answer Posted / sandhya

The trailing @ or more technically, line hold specifiers
are used to hold the pointer in the same record for
multiple iterations. The two tyoes of line hold specifiers
are single trailing(@) and double trailing(@@).

The single trailing hold the record until it encounters
either another input statement or end of the datastep.
They are used for the records such as

001F38 H
002 F 40 G

To read these values to the datastep

Data example;
input @10 type $ @;
if type='H' then
input @1 id 3. @4 gender $1. @5 age2.;
else if type='G' then
input @1 id3. @5 gender $1. @7 age 2.;
end;
cards;
001F38 H
002 F 40 G
;
run;

The double trailing holds the until the end of the record.

Data example2;
input id age @@;
cards;
001 23 002 43 003 65 004 32 005 54
;
run;

How can sas program be validated?

1037

---

Mention the difference between ceil and floor functions in sas?

1157

---

If you need the value of a variable rather than the variable itself what would you use to load the value to a macro variable? : sas-macro

1063

---

Approximately what date is represented by the SAS date value of 730?

1217

---

Which are the statements whose placement in the data step is critical?

1266

---

Tell me more about the parameters in macro? : sas-macro

1053

---

What is SAS? What are the functions does it performs?

1199

---

what is the difference between floor and ceil functions in sas? : Sas-administrator

1262

---

What is the difference between proportion and average?

3337

---

Explain by-group processing?

1004

---

Mention some common errors that are usually committed in sas programming.

1047

---

Name and describe few sas character functions that are used for data cleaning in brief.

1123

---

What is the difference between using drop = data set option in data statement and set statement?

1166

---

What is the use of divide function?

1067

---

Mention what is the difference between nodupkey and nodup options?

1012

---