HP 33s hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 208
Equations with (i), Loops for next value.
UPC - 082916001456
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Program Lines: (In RPN mode) Description: 1L2 L This routine collects all known values in three equations. Prompts for and stores a number into the variable addressed by i. 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: (In RPN mode) Description: !ª1L2 L This routine completes inverse by dividing by determinant. Divides element. 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. 13-24 Programming Techniques