Patent ID: 6142367
Filing Date: 2000-11-07
Classification: G06F

Abstract:
An electronic device havingan input unit for inputting a mathematical expression including a variable,a memory device for storing a value of the variable, the memory device including a first buffer for storing the mathematical expression, and a second buffer for expanding the stored mathematical expression into a character string to be displayed, anda display unit for displaying the mathematical expression on a display screen, comprising:a conversion unit for reading a value of a variable contained in the mathematical expression from the memory device and substituting the read-out value for the variable in the mathematical expression to be displayed on the display screen; anda change-over key for selecting between a first mode of displaying a mathematical expression on the display screen by the display unit after substituting the read-out value for the variable by the conversion unit and a second mode of displaying the mathematical expression on the display screen by the display unit with the variable displayed in terms of a variable-name, thereby allowing a user to change the mode of displaying the mathematical expression on the display screen by successively actuating the change-over key.