HP 10bII - INPUT Key; SWAP Key; Math Functions

INPUT Key
The key is used to separate two numbers when using
two-number functions or two-variable statistics. The (ev)
key can also be used to evaluate any pending arithmetic
operations, in which case the result is the same as pressing
SWAP Key
Pressing exchanges the following:
= The last two numbers that you entered; for instance,
to change the order of division or subtraction,
m The results of functions that return two values.
= The x- and y-values when using statistics.
Math Functions
One-Number Functions. Math functions involving one
number use the number in the display.
Keys: Display: Description:
@@DOOOSH 945 Calculates square root.
GOGOGQCOG 0.42 1/2.36 is calculated first.
(D
G 3.99 Adds 3.57 and 1/2.36
28 1:Getting Started