A statement block consists of a sequence of zero or more executable statements, executable constructs, FORMAT statements, and DATA statements that are embedded in another executable construct and are treated as a single unit.
Within an executable program, it is not permitted to transfer control from outside of the statement block to within it. It is permitted to transfer control within the statement block, or from within the statement block to outside the block. For example, in a statement block, you can have a statement with a statement label and a GO TO statement using that label.