Countdown

Description

By Eddie Shore, November 2011 (Eddie's Math and Calculator Blog)

Make a program that has the calculator count down from N to 1.

Instructions:
1. Enter N.
2. Press f B to run label B.

Note: The calculator is set to integer mode (f FIX 0). You may need to change the mode back after using this program.

If you own a HP-15C Limited Edition: Replace PSE with R/S, because the pause does not work (unfortunately).

Program Resources

Labels

Name Description
 B Main Routine
 0 Loop

Storage Registers

Name Description
 0 Counter

Program

Line Display Key Sequence
000
001 42,21,12 f LBL B
002 42, 7, 0 f FIX 0
003 43 44 g INT
004 44 0 STO 0
005 42,21, 0 f LBL 0
006 45 0 RCL 0
007 42 31 f PSE
008 42, 5, 0 f DSE 0
009 22 0 GTO 0
010 45 0 RCL 0
011 43 32 g RTN