Chain Calculations; Operator Priority - HP -22S Owner's Manual

Chain Calculations
Chain calculations do a sequence of operations without pressing
0
after each operation. The HP-22S interprets expressions using the sys-
tem of
operator priority
described in the next section.
Keys: Display:
7500120 9,131313.13131313+
3600
25.13131313
Description:
Calculates intermediate
value.
Completes the
calculation.
Operator Priority
Some chain calculations might be interpreted several different ways.
For example, 9+12+3 has two interpretations:
12
9
+ -
=
13 or
3
9
+
12
=
7
3
The HP-22S uses a system of operator priority to evaluate expressions:
~
(exponentiation) Highest priority
0 0
GG
~
Lowest priority
The HP-22S calculates an intermediate result when the next operator
you key in has lower or equal priority. When the next operator has
higher priority, the HP-22S retains the previous number(s). For exam-
ple, the calculation:
9012030
is performed as 9 + '(12 + 3) because division has higher priority
than addition.
2: Arithmetic and Variables 33