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In addition to the standard line comments defined by R5RS, Guile has
another comment type for multiline comments, called block
comments. This type of comment begins with the character sequence
#! and ends with the characters
!#, which must appear on a
line of their own. These comments are compatible with the block
comments in the Scheme Shell `scsh' (see section 46. The Scheme shell (scsh)). The characters
#! were chosen because they are the
magic characters used in shell scripts for indicating that the name of
the program for executing the script follows on the same line.
Thus a Guile script often starts like this.
#! /usr/local/bin/guile -s !#
More details on Guile scripting can be found in the scripting section (see section 9. Guile Scripting).
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