HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 292
BREAK, The Matrix commands, EDITMAT <matrix var>, REDIM <matrix var>;<size>
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BREAK This command will exit from the current loop, resuming execution after the end of it. Calculator Tip There is no GOTO command in the language as there is on some other calculators. This is often seen as a disadvantage by inexperienced programmers but in fact it usually results in code which is far more easy to read and much less likely to have bugs in it. Labels generally result in what is known in the trade as 'spaghetti code', so called because it has odd GOTO's that lead all over the place, intertwining and making it almost impossible to follow. There is no situation in which a GOTO statement cannot be replaced by one of the loops or conditional branches available in the HP Basic language. The Matrix commands EDITMAT This command pops up a window in which the user can edit or input a matrix with an bottom. When the user presses , execution resumes after the EDITMAT statement. key at the REDIM ; This command is very useful if the size of a matrix is not known in advance. The user might be prompted to input the size and then these values used to resize it. Note that the dimensions must be supplied as a list variable. The SIZE command can also be used in this context as it returns a list variable when used with a matrix. For example, you could find the current SIZE of a matrix and then use REDIM to add a new row or column. 292
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