what is the difference between clear and reset opcodes and
open and close opcodes?please tell me in real time senario
with example please?

And

What is the use of SFLNXTCHG?Where we can use this?

Answer Posted / balaji

CLEAR opcode is used to set a data item i.e. a field with
predefined default value based on its type. This opcode is
particularly useful when it specified for a data structure
because it clears all of the subfields in the data
structure.
char = *blanks Numeric = 0 etc

RESET is returns a filed to its intial value as specified
in INZ keyword.

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