Casio fx-3500P
| Datasheet legend
Ab/c:
Fractions calculation
AC: Alternating current BaseN: Number base calculations Card: Magnetic card storage Cmem: Continuous memory Cond: Conditional execution Const: Scientific constants Cplx: Complex number arithmetic DC: Direct current Eqlib: Equation library Exp: Exponential/logarithmic functions Fin: Financial functions Grph: Graphing capability Hyp: Hyperbolic functions Ind: Indirect addressing Intg: Numerical integration Jump: Unconditional jump (GOTO) Lbl: Program labels LCD: Liquid Crystal Display LED: Light-Emitting Diode Li-ion: Lithium-ion rechargeable battery Lreg: Linear regression (2-variable statistics) mA: Milliamperes of current Mtrx: Matrix support NiCd: Nickel-Cadmium rechargeable battery NiMH: Nickel-metal-hydrite rechargeable battery Prnt: Printer RTC: Real-time clock Sdev: Standard deviation (1-variable statistics) Solv: Equation solver Subr: Subroutine call capability Symb: Symbolic computing Tape: Magnetic tape storage Trig: Trigonometric functions Units: Unit conversions VAC: Volts AC VDC: Volts DC |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Casio fx-3500P
Here's yet another low-end Casio programmable calculator with a typical complement of functions: 38 program steps, 7 memory registers, a simplistic programming model, and a base set of scientific functions.
Limited as the programming model might be, Herman van Elburg, proud owner of a similar machine, taught me that it can still be used efficiently. And recently, Robert H. Windschitl wrote to me about an algorithm that minimizes the number of keystrokes needed to compute the Gamma function with good precision using Stirling's approximation. The result is the following programming example, which computes the logarithm of the Gamma function to 8+ digits of accuracy for any real argument:
Kin 2 ln Kin- 1 9 Min 1 Kin+ 2 Kout 2 X<=M ÷ 2 ÷ π = √ ln Kin- 1 Kout 2 1/x HYP SIN × Kout 2 = √ ln + Kout 2 ln - 1 = × Kout 2 + 0 X-K 1 =
