HP (Hewlett-Packard) HP 33s ユーザーズマニュアル

   

This routine collects all known values in three 
equations. 

 "!1

1L2

2 

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 

 exceeds the final counter value, execution 

branches back to A. 

Label J is a loop that completes the inversion of the 3 

× 3 matrix. 

   

This routine completes inverse by dividing by 
determinant. 

  !ª1

1L2

2 Divides 

element. 

   L 

Decrements index value so it points closer to A

 !  

Loops for next value. 

 ! 

Returns to the calling program or to  !.

You can use (i) in an equation to specify a variable indirectly. Notice that 1L2

2

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.