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+//Chapter 13 : Thin Film Preparation Techniques and their Applications
+
+clear;
+
+//Variable declaration
+Pmax=21*10**-3        //maximum power output
+Isc=100*10**-3        //short circuit voltage
+Voc=500*10**-3        //open circuit voltage
+Pin=35*10**-3         //Power input
+A=4                   //area of solar cell
+
+//Calculations
+Fill_Factor=Pmax/(Isc*Voc)
+n=(Pmax/(Pin*A))*100
+
+//Result
+mprintf("Fill factor = %.2f",Fill_Factor)
+mprintf("\nPercentage of efficieny = %d percent",n)    
+
+//The answer provided in the textbook is wrong
+