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+
+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.5(A)
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+etaT=0.20//total efficiency
+Eg=1.43//bandgap energy in eV
+V=2.5//applied voltage in V
+etae=etaT*Eg*100/V//external power efficiency
+mprintf("\n External power efficiency =%.2f percent ",etae);