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+clear//
+
+//Variables
+
+VSmin = 8.0 //Minimum source voltage (in volts)
+VSmax = 12 //Maximum source voltage (in volts)
+RS = 2.2 //Resistance (in kilo-ohm)
+VZ = 5.0 //Zener voltage (in volts)
+RL = 10.0 //Load resistance (in kilo-ohm)
+VL = VZ //Voltage across load (in volts)
+
+//Calculation
+
+ISmin = (VSmin - VZ)/ RS //Minimum value of input current (in milli-Ampere)
+ISmax = (VSmax - VZ)/RS //Maximum value of input current (in milli-Ampere)
+IL = VL / RL //Load current (in milli-Ampere)
+IZmin = ISmin - IL //Minimum Zener current (in milli-Ampere)
+IZmax = ISmax - IL //Maximum Zener current (in milli-Ampere)
+
+//Result
+
+printf("\n Minimum value of Zener current is %0.3f mA.\nMaximum value of Zener current is %0.3f mA.",IZmin,IZmax)