Texas Instruments TI-82 User Manual - Page 194
Calling Other Programs
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Calling Other Programs On the TI.82, any program can be called from another program as a subroutine. Enter the name of the program to use as a subroutine on a line by itself. Calling a Program from Another Program To call one program from another, begin on a blank line in the program editor and do one of the following: ¦ Press | to display the PRGM EXEC menu and select the name of the program. prgm and the name are copied to the current cursor location. ¦ Select prgm from the PRGM CTL menu and then type the letters of the program name (page 13.11). prgmname When this instruction is encountered during execution, the next command that the program executes is the first command in the second program. It returns to the subsequent command in the first program when it encounters either a Return instruction or the implied Return at the end. PROGRAM:VOLCYL ⇒ PROGRAM:AREACIRC :Prompt D :Prompt H ⇑ :Dà2!R ⇑ :π...R2 !A :prgmAREACIRC ⇒ ⇑ :Return ⇒ ⇒ ⇒ ⇒ :A...H!V ⇓ ⇑ :Disp V ⇓ Notes about Calling Programs Variables are global. label used with Goto and Lbl is local to the program in which it is located. label in one program is not "known" by another program. You cannot use Goto to branch to a label in another program. Return exits a subroutine and returns to the calling program, even if encountered within nested loops. 13-18 Programming
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