(Note) : The blinking cursor “ ” means the calculator is in insert mode On the contrary, the blinking cursor is displayed as “_” and it means the calculator is in overwrite mode.

To clear all characters, clear all input character by [ ON/AC ] key.

Replay function

• This function stores the latest operation executed. After execution is completed, pressing [ 2nd ] [ ] or [ 2nd ] [ ] key will display the operation from the beginning or the end. You can continue moving the cursor by [ ] or [ ] to edit it. To delete a digit, press [ DEL ]. ( or, in overwrite mode, just type over the digit). See Example 1.

• The replay function can keep input digits up to 256 characters for The calculator. After execution is completed or during entering, you can press either [2nd ] [ ] or [2nd ] [ ] to display previous input steps and edit values or commands for subsequent execu- tion. See Example 2.

(Note) : The replay function isn’t cleared even when [ ON/AC ] is pressed or power is turned off, so contents can be re called even after [ ON/AC ] is pressed.

Error position display function

• When a mathematically illegal calculation is performed, error posi- tion display function will tell you with the cursor where the error is. Press [ ] or [ ] to move the cursor and then give it a correct entry. You can also clear an error by pressing [ ON/AC ] and then re-entered the values and expression from the beginning. See Example 3.

Memory calculation

Independent memory

Press [ M+ ] to add a result to running memory. Press [ 2nd ] [ M– ] to subtract the value from running memory. To recall the value in running memory, press [ 2nd ] [ RCL ] [ M ]. To clear running memory, press [ 0 ] [ STO ] [ M ]. See Example 4.

(Note) : Besides pressing [ STO ] key to store a value, you can also assign values to memory variable M by [ M+ ] or [ M– ].

Memory variable

The calculator has nine memory variables for repeated use : A, B, C, D, E, F, M, X, Y. You can store a real number in any of the nine

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Citizen SR-270N Replay function, Error position display function, Memory calculation, Independent memory, Memory variable