Citizen SR-270N manual Stack, Order of operations, Accuracy and Capacity

memory variables. See Example 5.

*[ STO ] + A ~ F , M , or X ~ Y lets you store values to variables.

*[ 2nd ] [ RCL ] or [ ALPHA ] + A ~ F , M , or X ~ Y recalls the value of variable.

* [ 0 ] [ STO ] + A ~ F , M , or X ~ Y clears the content to a specified memory variable.

*[ 2nd ] [ Mcl ] [ = ] clears all variables.

Stack

This calculator uses memory areas, called “ stacks “, to temporarily store values (numeric stack) and commands (command stack ) ac- cording to their precedence during calculations. The numeric stack has 10 levels and command stack has 24 levels. A stack error (Stk ERROR) occurs whenever you try to perform a calculation that is so complex that the capacity of a stack is exceeded.

Order of operations

Each calculation is performed in the following order of precedence :

1)Coordinates transformation.

2)Type A functions which are required entering values before

pressing the function key, for example, x 2, , x !, x –1.

3),

4)Fractions.

5)Abbreviated multiplication format in front of variables, π.

6)Type B functions which are required pressing the function key before entering, for example, sin, cos, tan, sin –1, cos –1, tan –1, sinh, cosh, tanh, sinh –1, cosh –1, tanh –1, log, ln, 10 X ,

e X, , , ( – ).

7)Abbreviated multiplication format in front of Type B functions , Alog2, etc.

8)nPr, nCr

9)x , ÷

10)+, –

•When functions with the same priority are used in series, execution is performed from right to left.

e X ln120→ e X { ln (120 ) } otherwise, execution is from left to right.

•Compound functions are executed from right to left.

•Anything contained within parentheses receives the highest priority.

Accuracy and Capacity

Output digits : Up to 10 digits.

Calculating digits : Up to 15 digits -E6-