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+//Chapter 16, Example 16.3
+clc
+//Initialisation
+vz=3.6                        //voltage
+Rl=200                     //resistance in ohm
+ron=10                      //internal resistance in ohm
+R=47                          //chosen value of resistor in ohm
+V=5.5                          //minimum supply voltage
+IL=0.018                       //current in ampere
+
+//Calculation
+Il=vz/Rl                       //current in ampere
+Pr=(V-vz)**2/R                  //power in watt
+Pz=(((V-vz)/R)-IL)*vz               //power in watt
+
+//Results
+printf("Pr(max) = %d mW\n",round(Pr*1000))
+printf("Pz(max) = %d mW",round(Pz*1000))