User manual TERRAILLON SYMPHONY

[. . . ] This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, you can try to correct the interference by one or more of the following measures: ?Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. [. . . ] This is an important difference between performing a calculation on the Home screen and in a program. These calculations will not display a result in a program (although they will on the Home screen). :126 :cos(p/4) :solve(x^2?x?2=0, x) Output commands such as Disp :Disp 126 will display a result in a program. :Disp cos(p/4) :Disp solve(x^2?x?2=0, x) Programming 580 Displaying a calculation result does not store that result. If you need to refer to a result later, store it to a variable. :cos(p/4)!maximum :Disp maximum Note: A list of output commands is available. Getting Values into a Program To input values into a program, you can: ?Require the users to store a value (with ) to the necessary variables before running the program. The program can then refer to these variables. Enter the values directly into the program itself. ? Include input commands that :Input "Enter a value", i prompt the users to enter the :Request "Enter an necessary values when they integer", n run the program. Require the users to pass one or more values to the program when they run it. prog1(3, 5) ? Note: A list of input commands is available. Programming 581 Example of Passing Values to a Program The following program draws a circle on the Graph screen and then draws a horizontal line across the top of the circle. Three values must be passed to the program: x and y coordinates for the circle?s center and the radius r. If you store to any other variables, you must declare them as local from within the function. ?? Cannot call a program as a subroutine, but it can call another user-defined function. Cannot define a global function, but it can define a local function. Note: Information about local variables is available. Entering a Function When you create a new function in the Program Editor, the TI-89 Titanium displays a blank ?template. ? Note: Use the cursor pad to scroll through the function for entering or editing commands. Programming 585 Function name, which you specify when you create a new function. Enter your commands between Func and EndFunc. Be sure to edit this line to include any necessary arguments. Remember to use argument names in the definition that will never be used when calling the function. If the function requires input, one or more values must be passed to the function. (A user-defined function can store to local variables only, and it cannot use instructions that prompt the user for input. ) How to Return a Value from a Function There are two ways to return a value from a function: ?As the last line in the function (before EndFunc), calculate the value to be returned. :cube(x) :Func :x^3 :EndFunc Programming 586 ? Use Return. This is useful for exiting a function and returning a value at some point other than the end of the function. :cube(x) :Func :If x<0 : Return 0 :x^3 :EndFunc Note: This example calculates the cube if x|0; otherwise, it returns a 0. The argument x is automatically treated as a local variable. However, if the example needed another variable, the function would need to declare it as local by using the Local command. [. . . ] 316 SocialSt (social studies) category . 75, 81, 444 solve, solve( ) 75, 81, 238, 240, 241, 245, . . 251, 254, 258, 444 solving linear equations . 549, 551, 552, 556, 558 plots off, PlotsOff . [. . . ]