Commodore 128D - The SLEEP Command; Formatting Output; The PRINT USING Command

This program asks for a number from the user. IF the number is less
than 100, the statements between the keywords BEGIN and BEND
are performed, along with any statements on the same line as BEND
(except for ELSE). The message "YOUR NUMBER WAS Nr appears
on the screen. Line 50 is a delay loop used to keep the message on
the screen long enough so it can be read easily. Then a FOR/NEXT
loop is used to display a message for the number of times specified
by the user. If the number is greater than 100, the THEN condition is
skipped, and the ELSE condition (printing "TOO MANY") is carried
out. The ELSE keyword must be on the same line as BEND.
The SLEEP Command
Note the use of the SLEEP command in line 50 of the program just
discussed. SLEEP provides an easier, more accurate way of insert
ing and timing a delay in program operation. The format for the
SLEEP command is
SLEEP n
where n indicates the number of seconds, in the range 1 to 65535,
that you want the program to delay. In the command shown in line
50, the 2 specifies a delay of two seconds.
U
U
Formatting
Output
The PRINT USING Command
Suppose you were writing a sales program that calculated a dollar
amount. Total sales divided by number of salespeople equals aver
age sales. But performing this calculation might result in dollar
amounts with four or five decimal places! You can format the results
the computer prints so that only two decimal places are displayed.
The command which performs this function is PRINT USING.
PRINT USING lets you create a format for your output, using spaces,
commas, decimal points and dollar signs. Hash marks (the # sign)
are used to represent spaces or characters in the displayed result.
For example:
PRINT USING "#$#####.##";A
tells the computer that when A is printed, it should be in the form
given, with up to five places to the left of the decimal point, and two
places to the right. The hash mark in front of the dollar sign indicates
that the $ should float; that is, it should always be placed next to the
left-most number in the format.
78
USING C128 MODE—Some BASIC Commands and Keyboard Operations Unique to
C128Mode