fx-9860GII TI-83
QUIT
On a TI calculator you can quit from a screen
QUIT 2nd MODE
Explanation
Your calculator is locked while an error message is on the display. Press EXIT to clear the error. Press left ◄ or right ► to display the calculation and correct the problem. Pressing EXIT does not clear replay memory, so you can recall the last calculation.
Example 1
To enter 00
ERR:DOMAIN
1:Quit
2:GotoQUIT 0 ∧ 0 ENTER 2nd MODE
although it is determined by definition that 00 ≝ 1. Take that as a warning.
