A conditional statement specifies the truth value of a condition and the subsequent action of the object program is dependent on this truth value. The below lists contain COBOL statements that become conditional when a condition is specified and when the statement is not terminated by its explicit sope terminator.

Arithmetic -

• ADD ... ON SIZE ERROR
• ADD ... NOT ON SIZE ERROR
• COMPUTE ... ON SIZE ERROR
• COMPUTE ... NOT ON SIZE ERROR
• DIVIDE ... ON SIZE ERROR
• DIVIDE ... NOT ON SIZE ERROR
• MULTIPLY ... ON SIZE ERROR
• MULTIPLY ... NOT ON SIZE ERROR
• SUBTRACT ... ON SIZE ERROR
• SUBTRACT ... NOT ON SIZE ERROR

Data Movement -

• STRING ... ON OVERFLOW
• STRING ... NOT ON OVERFLOW
• UNSTRING ... ON OVERFLOW
• UNSTRING ... NOT ON OVERFLOW

Decision -

• IF
• EVALUATE

Input-output -

• DELETE ... INVALID KEY
• DELETE ... NOT INVALID KEY
• READ ... AT END
• READ ... NOT AT END
• READ ... INVALID KEY
• READ ... NOT INVALID KEY
• REWRITE ... INVALID KEY
• REWRITE ... NOT INVALID KEY
• START ... INVALID KEY
• START ... NOT INVALID KEY
• WRITE ... AT END-OF-PAGE
• WRITE ... NOT AT END-OF-PAGE
• WRITE ... INVALID KEY
• WRITE ... NOT INVALID KEY

Ordering -

• RETURN ... AT END
• RETURN ... NOT AT END

Program or method linkage -

• CALL ... ON OVERFLOW
• CALL ... ON EXCEPTION
• CALL ... NOT ON EXCEPTION
• INVOKE ... ON EXCEPTION
• INVOKE ... NOT ON EXCEPTION

Table-handling -

• SEARCH