Texas Instruments Derive 5 Introduction Manual page 10

Kutzler & Kokol-Voljc: Introduction to D
Replace the last input by
Enter 1/2+1&3 (¢).
When a syntax error is detected, the cursor is moved to the location of the error and the cause of
the error is displayed in the Status Bar's first pane. In the above example D
unexpected special character. In some cases (for
parenthesis instead of the division symbol) there are several errors possible, and D
guess.
Update the input to 1/2+1/3: Use the (Del) key (or the right arrow key (Æ) followed by
the backspace key (æ_)) to delete the incorrect character, then type the division operator.
Conclude with (¢).
The expression and its label, #2, are displayed. The new expression is highlighted in reverse
video. Expression #1 is no longer highlighted.
If you mistyped the input and want to delete the highlighted expression for a retry, use (Esc) to
move the focus into the algebra window, use the 'Delete' key (Del) to delete the highlighted
expression, then use the
An alternative technique for replacing an expression will be explained in Chapter 2.
Simplify expression #2 using the Command Toolbar's
The result becomes the next expression with the label #3. By default, simplified expressions are
displayed centered. This makes it easy to distinguish between entry and result. As with many
other behaviors of D
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Even after using the Simplify button, the focus still is in the entry line. Enter the next
24
expression, . To enter the square root symbol, use the respective button on the Math
Symbol Toolbar:
Enter
24
as:
5
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1 1
with an intentional typographical error:
2 3
Author Expression
, this can be customized if desired.
24 (¢)
example, when entering an opening
button to move the focus back into the entry line.
Simplify
discovered an
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button .
5
can only