Editing Block (programming) (section)

==Limitations==
Some languages which support blocks with declarations do not fully support all declarations; for instance many C-derived languages do not permit a function definition within a block ([[nested function]]s). And unlike its ancestor Algol, Pascal does not support the use of blocks with their own declarations inside the begin and end of an existing block, only compound statements enabling sequences of statements to be grouped together in '''if''', '''while''', '''repeat''' and other control statements.