Commodore Plus 4 - Page 105

BASIC Version 3.5 Commands, Functions, and System Variables
Parameter: any number or numeric expression
93
Examples: PRIKTT TAN(tt/3)
1.73205081
Prints the tangent of an angle of ir over 3
radians (60 degrees).
PRINT TAET(30*7r/180) Prints the tangent of an angle of 30 degrees.
.577350269
TI
Abbr. none
Reserved system variable that represents the current value of the hardware
interval timer, which is also called the jiffy clock. The interval clock starts at zero
each time you turn on the computer, and it is updated every 1 / 60th of a second as
long as the computer is on (up to 24 hours). TI is stated in 60ths of a second; to
find out the time in seconds, divide TI by 60. For more information, see SETTIM
in Chapter 5.
The interval clock is not on during many input and output operations.
You can use the value of TI (that is, -TI) to seed random number generation in
the RND function.
TI$
Abbr. none
Example:
Reserved system variable that represents the current value of the hardware
interval timer, which is also called the jiffy clock. The interval clock starts at zero
each time you turn on the computer, and it is updated every 1 / 60th of a second as
long as the computer is on (up to 24 hours). TI$ is stated in six digits: the first two
represent the current hour, the next two represent the current minute, and the last
two represent the current second.
The interval clock is not on during many input and output operations.
You can reassign the value of the clock by assigning a six-digit value to TI$.
When you reassign TI$, you must use six digits in quotation marks. If you type
any more or fewer digits, the command is rejected, and the message ILLEGAL
QUANTITY ERROR is displayed.
The following little program shows that TI and TI$ both hold the current value
of the interval clock, each in its own way.
10 PREKTT TI/60
20 PRINT TI$
30 TI$="000000"
RUN
106.833333
000146
Shows the number of seconds the computer has been
on. Shows the time the computer has been on in hours
(00), minutes (01), and seconds (46).