Texas Instruments TI Programmable 57

CONDITIONAL TRANSFERS
— “Is x GREATER THAN OR Equa. To t?” Key SEQUENCE
When the program pointer comes to this instruction in a program, the
following things happen:
«The calculator compares the contents of the x and t registers.
-It asks the question: "Is x greater than or equal to t?”
*If the answer is yes, it goes on to the instruction that immediately
follows.
+If the answer is no, it skips the following instruction and continues.
[INV] — “Is x Less THAN t?” — (x<t) Key SEQuENCE
When the program pointer comes to this instruction in a program, the
following things happen:
*The calculator compares the contents of the x and t registers.
«It asks the question; “Is x less than t?”
+If the answer is yes, it goes on to the step immediately
following the EB key sequence.
-If the answer is no, it skips the step immediately following, and
continues.
AppiTionat Notes:
It's really quite easy to remember these instructions if you keep your eye
on the “big picture’, Basically you can have the calculator make any one
of four tests: Is x equal t, is x greater than or equal t, or their inverses — Is
x unequal t, Is x less than t? Whatever the case, the calculator makes a
test and asks a question. If the answer to the question is yes, it goes right
on te the step immediately following. If the answer is no, it skips the step
immediately following, and continues.
Note that the quantity x that's compared to t is the contents of the display
register. The display register holds numbers to !1 digits, of
which only 8 are actually shown (correctly rounded) in the calculator's
display window. In certain cases these last 3 digits can affect the
outcome of the comparisons described in this section. (These cases are
rare, but if a problem should arise, it's helpful to know about this
possibility.)