HP 32SII - Manual (Page 214)

13–24 Programming Techniques
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm

 ! L Stores loop–control number in i.
The next routine is L, a loop to collect all 12 known values for a 3x3
coefficient matrix (variables A – I) and the three constants (J – L) for the
equations.
Program Lines: Description:

   This routine collects all known values in three
equations.

  "!1L2 Prompts for and stores a number into the variable
addressed by i.

   L Adds 1 to i and repeats the loop until i reaches
13.012.

 ! 

 !  When i exceeds the final counter value, execution
branches back to A.
Label J is a loop that completes the inversion of the 3 × 3 matrix.
Program Lines: Description:

   This routine completes inverse by dividing by
determinant.

 ! ª1L2 Divides element.

   L Decrements index value so it points closer to A

 !  Loops for next value.

 ! Returns to the calling program or to  ! .
Equations with (i)
You can use (i) in an equation to specify a variable indirectly. Notice that
1L2 means the variable specified by the number in variable i (an indirect
reference), but that i or 1L2 means variable i.
The following program uses an equation to find the sum of the squares of
variables A through Z.
Program Lines: Description:

   Begins the program.

  
Sets equations for execution.