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What is the difference between select options and parameters

Question Posted / jagadish

Answer Posted / jagadish

parameter : 1) parameter is a key word which is used to accept the single value at run time.
2).without input value we cannot execute the parameters.
3).name of the parameter should not exceed 8 characters.
syntax: Parameters : p_a type I.
to pass the default values to the parameter
parameters : p_a type I default value 10.

to make the parameter value as mandatory we have to use the obligatory keyword.
parameters : p_a type I obligatory.
NOTE: we cannot write floating type values under parameter.

DATA : A type I,
B type I,
C type I.
parameters :P_ A type I DEFAULT 100, * obligatory
P_B type I DEFAULT 200.*obligatory

A=P_A.
B=P_B.
C=A+B.
write C.

Select-option : select option is a keyword which is used to accept single value,multiple single values,ranges,multiple ranges at run time
syntax: DATA : L_VBELN TYPE VBELN_VA.
select-options: S_VBELN for L_VBELN.
whenever we create a select option sysytem will create a internal table with header line with 4 fields.it will used to select and deselect the ranges.
LOW,SIGN,HIGH,OPTION.
name of the select option doesnt increse 8 characters.

NOTE : with out input value we can select options and it will fetch the entire data of the table..

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