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Programmable calculators Casio fx-5200P
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Datasheet Years of production: 1985  Display type: Alphanumeric display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 5½"×7"×½" Display size: 12 characters
Weight: 5 oz    
    Entry method: BASIC expressions 
Batteries: 2×"CR-2032" Lithium Advanced functions: Trig Exp Hyp Lreg Cmem Const 
External power:   Memory functions:  
I/O:      
    Programming model: BASIC 
Precision: 12 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 26 numbers Program display: Text display  
Program memory: 512 bytes Program editing: Text editor  
Chipset:   Forensic result: 9.00000716758  

fx5200p.jpg (47194 bytes)This curious Casio machine has the appearance of a traditional calculator, but offers a BASIC programming model like those found in Casio's pocket computers.

So here's yet again this somewhat boring example, a Gamma function program:


10 INPUT X
20 X=X+5
30 S=X* LNX-X+ LN(2*pi/X)/2+1/12/X-1/360/X^3+1/1260/X^3/X^2
40 PRINT EXP(S- LN((X-1)*(X-2)*(X-3)*(X-4)*(X-5)))