Casio FX-991ES User Guide - Page 55

k Number Base Setting and Value Input Use the keys listed below to specify the number base. The key markings used in this section are the ones that are above each key, on the right. Key Number Base U Decimal c Hexadecimal b Binary q Octal Screen Indicator Dec Hex Bin Oct • The current number base setting is indicated in the second line of the display. • The initial default number base setting when you enter the BASEN Mode is always decimal (DEC). Inputting Values In the BASE-N Mode, you can input values using the currently selected number base. • A Syntax ERROR occurs if you input values that are not allowed for the currently selected number base (such as inputting 2 while binary is selected). • You cannot input fractional values or exponential values in the BASE-N Mode. If a calculation produces a fractional value, the decimal part is cut off. Inputting Hexadecimal Values Use the keys shown below to input the alphabetic letters (A, B, C, D, E, F) required for hexadecimal values. {A} {B} {C} {D} E F yew s c t Value Ranges Base Range Positive: 0000000000000000 < x < 0111111111111111 Binary Negative: 1000000000000000 < x < 1111111111111111 Octal Positive: 00000000000 < x < 17777777777 Negative: 20000000000 < x < 37777777777 Decimal -2147483648 < x < 2147483647 Hexa- Positive: 00000000 < x < 7FFFFFFF decimal Negative: 80000000 < x < FFFFFFFF • The allowable calculation range is narrower from binary (16 bits) than it is for the other number systems (32 bits). • A Math ERROR occurs when a calculation result is outside the applicable range for the number system being used. E-53