b = find
function determines the existence of a case in a data file that matches a specified condition. The function searches the index of a file and determines whether any case matches the specified condition. The position in the file is not changed, unlike the similar locate
function, and no case is loaded into memory
refers to either an external dictionary or the main input file of an entry or batch application. If referencing the main input file of a batch application, you must run your program in indexed order
The relational_operator is one of the following: =, <, <=, >, or >=.
The string expression key_prefix
specifies the condition to use when searching for cases. Cases with a key
that begins with or equals the key_prefix
are considered eligible cases.
The function returns a logical value of 1 (true) if a case is found and 0 (false) otherwise.