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Program Execution Controls
4-8
4.3.1
PAUSE Statement
The
format
of
the
PAUSE
statement
is
PAUSE [msg]
where
'msg'
is
a string
of
not
more
than
five digits,
or
is
a character constant.
At
the
time the
PAUSE
is
executed
and
program execution ceases,
'msg'
is
displayed on the
console terminal.
Program
execution must be resumable following the pause. Resumption
is
not
under
program control, however, and might be initiated, for example, by
an
external inter-
rupt
such as a key being pressed.
If
execution
is
resumed, the normal execution
se-
quence
is
continued with the statement following the
PAUSE
statement.
Examples:
PAUSE
PAUSE
1234
PAUSE
'BREAK
12'
4.3.2 STOP Statement
The
format
of
the
STOP
statement
is
STOP [msg]
where
'msg'
is
a string
of
not
more
than
five digits,
or
is
a character constant.
STOP
terminates execution
of
the executable program. When this happens
'msg'
is
displayed on the console terminal.
Examples:
STOP
STOP
22
STOP
'CHECK
SUM'
4.3.3
EN
0 Statement
The
format
of
the
END
statement
is
END
The
END
statement
marks
the end
of
a program unit.
If
executed in a main pro-
gram, it terminates the program.
If
executed in a
subprogram,
it has the effect
of
a
RETURN
statement and returns
to
the main program. The last line
of
every pro-
gram unit
must
be
an
END
statement.
An
END
statement
is
written only in columns 7
through
72
of
an initial line and
must
not
be continued. No other statement in a
program
unit can have an initial line
that
appears
to
be
an
END
statement.
FORTRAN-SO