1. Why picture clause should not be specified for
comp1 and comp2?
The use of PICTURE Clause is to specify the data type, size & format. If you kniow the things already (float, 4&8B, Hex) then there is no need to specify PIC clause.
2. whatz the use of pointer option in string command?
To specify the starting position of the receiving string. (also to count the no of receiving characters)
3. what are low-values and high-values mean in
Low-Values refers the lowest value in collating sequence (ASCII / EBCDIC). It's usually B'0000000 in ASCII and B'00000000' in EBCDIC. AND High values refers the highest value of collating seq. It's B'11111111' in EBCDIC AND SO ON... (You can also say as x'00' and X'FF' respectively.[/quote]