Begin - end
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"Begin" and "end" are used to designate blocks of code. A block consists of one or more statements that are combined to form a single new statement. This statement has the form:
begin STATEMENT; STATEMENT; ... STATEMENT end
Note that statements within the block are separated by semicolons.
Each "begin" must have a matching "end". A common programming error is mismatched "begin-end" pairs.
Square brackets ([ ]) can be used instead of "begin" and "end". For example, this is a block:
[X:= 12; Y:= 5]