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IBM 5100 Apl Reference Manual

IBM 5100
228 pages
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(
("
Branch
Arrow
+
[]
The
branch arrow
is
used for
the
following:
•
To
change
the
order
in which
the
statements
are
executed
in
a user-defined
function. See Branching
in
Chapter 6 for more information
on
branching.
•
To
resume
execution
of
a suspended
function
(see Suspension
in
Chapter 7).
• To clear
the
state
indicator (see State Indicator
in
Chapter 7).
OuadO
CD
The
quad
is
used
to
ask for
input
and
to
display
output.
To
display
output,
the
quad
must appear immediately
to
the
left
of
the
assignment arrow.
The
value
of
the
APL
expression
to
the
right
of
the
arrow
is
assigned
to
the
quad and will be displayed.
For example:
7
1.2
The
7 displayed
is
the
value assigned
to
the
quad.
The 12
is
the
final evaluation
of
the
APL expression.
When used
to
ask for
input,
the
quad
can appear anywhere
except
to
the
immediate
left
of
the
assignment arrow. Execution
of
the
expression
stops
at
the
quad
a'nd
re-
sumes when an expression
is
entered
to
re'place
the
quad. When a quad
is
encountered,
the
quad and
colon
symbols
(0:
) are displayed
to
indicate
that
input
is
requested.
For example:
[]:
:LOO
See Chapter 6 for more information on quad
input
or
output
within
a user-defined
function.
121

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IBM 5100 Specifications

General IconGeneral
BrandIBM
Model5100
CategoryLaptop
LanguageEnglish

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