83 Did You Know…
toolbar-separator.png This page has been deleted from the main contents of the wiki, and moved to the deleted: namespace as a record of its contents. Rather than adding content to this page, please put it somewhere where it will actually have a use. In addition, please avoid linking to this page.

{$part1begin}

To add a DYK, move the second DYK from {$part2} to {$part3}, and add a new DYK to {$part2}. See the Did You Know... Archives page to view the data on this page in a cosmetic format.

{$part1end}
{$part2begin}

…that it is actually sometimes better to leave on the closing parentheses on the For( loop?

…that a memory leak is caused when you use a Goto/Lbl within a loop or If conditional (anything that has an End command) to jump out of that control structure before the End command is reached?

…that you can omit the closing parentheses, quote, square bracket, curly brace, etc. at the end of a command or function?

{$part2end}
{$part3begin}

…that while using seq(, the calculator can still interpret keypresses and store them to getKey?

…that you can use tanh(E9X to compute the sign of X?

…that Line( has an optional fifth argument that, if zero, will erase the pixels on a line?

…that you can remove the "Done" message that appears after a program is finished running by placing an expression, some text, or just a quote on the last line of your program?

…that you can use rand(# to create a time delay?

…that you can use multiple text arguments at the end of one Text( command to write, for example, Text(R,C,"Score",S)?

…that you can draw with different plot marks using Pt-On(X,Y,#)?

…that you can save memory when displaying text by replacing words such as "If" and "Time" with the appropriate commands?

…that "0<X<10" will actually compare "0<X" first, and compares the result (0 or 1) to 10, so "0<X and X<10" should be used instead?

…that using ΔList( together with cumSum( will return a list with its first element removed?

…that there are 256 picture variables built-in to the TI-83+ calculator, even though the calculator only shows 10 picture variables?

…that you can enable the faster circle drawing flag on the TI-83+ by placing a list with an imaginary i after the last argument of the Circle( command?

…that you can get the home screen font on the graph screen (except on the regular TI-83) by placing a '-1' at the beginning of the Text( command?

…that you can get the number of digits in a whole number by using the formula 1+int(log(#?

…that the smallest way to implement the distance formula is by using the R►Pr( command?

…that you can use the % symbol or sub( with one argument as a smaller replacement for multiplying by .01?

…that you can get rid of the run indicator by using Text(-1,0,90," ") on the graph screen and Output(1,16," ") on the home screen?

…that you can run your TI-Basic program from an assembly shell by placing a colon (":") as the first line of your program?

…that you can store to the list element one past the last element to add it to the end?

…that it is actually sometimes better to leave on the closing parentheses on the For( loop?

…that the finance variables are the fastest variables to use, even faster than Ans?

…that the String►Equ( command is completely useless, and you can store a string into one of the equation variables just using the → (store) operator?

…that the fastest way to check for a whole number is not(fPart(?

…that you can compress a list of related numbers by combining them into integer and fraction parts?

…that the majority of the graphics commands are dependent upon the window dimensions, so you should always use a friendly graphing window to ensure everything shows up as you intended?

…that you can make subprograms that are contained inside the program itself, so that they can be called by the program whenever needed?

…that you can use SetUpEditor to UnArchive a list, but at the same time create it if it doesn't exist?

…that you can get away with not having a colon or a new line after DelVar?

…that placing a Lbl after DelVar will make that Lbl literally disappear?

…that you can scroll the Pause command's optional argument to see it in its entirety?

…that the smallest (though not the fastest) way to shade the entire graph screen is Shade(Ymin,Ymax)?

…that pressing alpha in the program editor followed by up or down, you will scroll a whole page of program code?

…that pressing 2nd right in the program editor will take you to the end of your current line, and 2nd left will take you to the beginning of that line?

…that TI added several new TI-Basic commands to the newer TI-84+/SE calculators?

…that any math calculations that involve extremely small or large numbers (ranging from -E99 to E99) will produce rounding errors that don't return the right number?

…that a memory leak is caused when you use a Goto/Lbl within a loop or If conditional (anything that has an End command) to jump out of that control structure before the End command is reached?

…that a Repeat loop will always loop at least once, regardless of if the condition is true or false before entering the loop?

…that the arrow and DEL keys can actually be held down, which will cause the key to keep being repeated until it is unpressed?

…that the key codes follow a simple pattern: a key is represented by putting its row and column together?

…that you can access the lowercase letters by using an assembly program to turn on the lowercase flag that the calculator uses for enabling lowercase letters?

…that the Horiz will split the screen in half horizontally, with both the graph screen and home screen being shown at the same time?

…that the expr( command allows you to store an expression to a string and then execute the string?

…that the TI-83 series of calculators does implicit multiplication, so there is no need to ever use the * sign?

…that iPart( and int( will return the same answers for positive numbers, but int( will return an answer 1 less than iPart( for (non-integer) negative numbers?

…that lists are the only variable that you can give your own names to?

…that you can omit the closing parentheses, quote, square bracket, curly brace, etc. at the end of a command or function?

…that Finance under the Applications menu is really not an application at all?

{$part3end}

Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License