Editing ALGOL 68 (section)

===pr & co: Pragmats and Comments===
Pragmats are [[Directive (programming)|directives]] in the program, typically hints to the compiler; in newer languages these are called "pragmas" (no 't'). e.g.

 '''PRAGMAT''' heap=32 '''PRAGMAT'''
 '''PR''' heap=32 '''PR'''

Comments can be inserted in a variety of ways:

 ¢ The original way of adding your 2 cents worth to a program ¢
 '''COMMENT''' "bold" comment '''COMMENT'''
 '''CO''' Style i comment '''CO'''
 # Style ii comment #
 £ This is a hash/pound comment for a UK keyboard £

Normally, comments cannot be nested in ALGOL 68. This restriction can be circumvented by using different comment delimiters (e.g. use hash only for temporary code deletions).