HP 49g Graphing Calculator - Manual (Page 197)

Using
global variables
You can use existing global variables in your pi-ograms. Global variables
are different to local variables in the following ways:
• Global variables are available to the entire program, independent of
nested procedures.
• Unlike local variables, you can create more than one global variable in
a nested procedure.
Within a program, you use the (Fn>) key to define a global variable. The
^ key produces a ^ symbol on the command line.
Example
The following program demonstrates the use of a global variable to hold
the data a program uses, and to hold the output it produces. It performs
the following tasks:
• It accepts an input argmnent and calculates its percentage of a value in
the global variable “TOTL”. You create TOTL before you mn the
program.
• It stores the result into another global variable, “RESLTl”.
• It converts the numeric result to a string and adds “%” for readability.
To create the program, perfonn the following:
1. Insert the program delimiters onto the command line and define the
input variable.
0©00®i)A
« ^ A
2. Create a new nested procedure.
0 @
Introduction to programming Page 10-11