Conditional Tests And Conditional Branches - HP -33E Owner's Handbook Manual

Branching 49
Conditional Tests
and Conditional Branches
Often there are times when you want to make a decision. Your HP-33E
makes use of conditionals and conditional branches to increase your
programming capabilities. The conditional operations on your HP-33E
keyboard are useful as program instructions to allow your calculator to
make decisions. The eight conditionals that are available on your
HP-33E are:
] Tests to see if the value in the X-register is not equal to the
value in the Y-register.
3 Tests to see if the value in the X-register is equal to the value
in the Y-register.
1 I'ests to see if the value in the X-register is greater than the
g g
value in the Y-register.
] Teststo see if the value in the X-registeris less than or equal
to the value in the Y-register.
(9 Teststo see if the value in the X-register is not equal to zero.
Tests to see if the value in the X-register is equal to zero.
Teststo see if the value in the X-register is greater than zero.
Tests to see if the value in the X-registeris less than zero.
Each conditional essentially asks a question whenit is encountered as an
instruction in a program. If the answer is YES, program execution
continues sequentially downward with the next line in program memory.
If the answer is NO, the calculator branches around the next line. For
example:
Program Memory
——
f
<——J No
: Conditional Test
Yes