How do you handle the exceptions in COBOL programming?

Answer 1

Some keywords have exception checking available, some don't.

For example, the READ statement has AT END and INVALID KEY;

the math keywords ADD, MULTIPLY, COMPUTE, etc. have

ON OVERFLOW and so on to denote code to be executed when

those exceptions are detected. You can also specify a field for a

file to hold status codes which then can be interrogated after an

input/output statement to determine particular exceptions (duplicate inserts, etc.).