HP HP-32S - Branching (GTO)

Returns to From main program,
main program
XEQ S
/
Program Lines:
1 Description:
S01
LBL S
—1 Starts the main subroutine.
S02 INPUT fl
Enters A.
S03 INPUT
B
Enters B.
S04
INPUT C
Enters C.
S05 INPUT 0
Enters D.
S06
RCL 0
Recalls the data for the calcula
S07
RCL C
tion to follow.
S08 RCL B
S09
RCL R
S10
x2
Calculates A2.
Sll
XEQ Q
Calculates B2, then A2 + B1.
1
-&-S12 XEQ Q
Calculates A2 + B2 + C2.
2
-OS 13 XEQ Q
Calculates A2 + B2 + C2 + D2
3
-^S14 SQRT
Calculates
Va2 + B2 + C2-r-D2
Ends main subroutine; returns
S15
RTN
execution to main program.
Q01
LBL Q
Starts nested subroutine.
Q02
xOy
Squares number and adds it to
Q03
X*
the current sum of squares.
Q04
+
— Q05
RTN
Ends nested subroutine, 0; re-
turns to first subroutine, S.
Branching (GTO)
As we have seen with subroutines, it is often desirable to transfer exe
cution to a part of the program other than the next line. This is called
branching.
6: Programming Techniques 93