Radio Shack TRS-80 User Manual page 39

Chapter
8
Two
Easy Features
The
Calculator
Mode
Before continuing our
exploration of the
nooks and
crannies of our Computer
—
acting
as
a
computer, we
should be aware
that
it
also
works
well
as a calculator.
If
you omit
the
line
number
before
certain
commands,
the
Computer
will execute them,
print
the answer on
the screen, then
erase the
command
you
entered. What's more,
it
will
work
as
a calculator
even
when
a
computer program
is
loaded,
without
disturbing that program.
All
you
need, to
be
in
the
calculator mode,
is
the
prompt
>,
Example:
How
much
is
3 times 4?
Type
in
PRINT
3*4
. . .
the
answer comes back
12
Example:
How
much
is
345
divided
by 123?
PRINT 345/123
. . .
the
answer
is
2
.
80488
Spend
a
few minutes making up
routine arithmetic problems
of your own,
using the
calcula-
tor
mode
to solve
them.
Any
arithmetic expression you
might
use in a
program
can
also be
evaluated
in
the
calculator
mode.
This includes parentheses
and
chain
calculations
like
A*B*C.
Try
the following
problem:
PRINT
(
2/3
)
*
{
3/2
)
The
answer comes
back:
1
.0000009
37