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+// Chapter 3_The Semiconductor in Equilibrium
+//Caption_Charge Neutrality
+//Ex_9//page 112
+T=300    //temperature in kelvin
+Nd=10^16   //donor concentration per cm cube
+Na=0
+ni=1.5*(10^10)  //intrinsic carrier concentration
+no=((Nd-Na)/2)+(((Nd-Na)/2)^2+ni^2)^0.5
+po=ni^2/no;
+printf('The majority carrier electron concentration is %fd per cm cube while the minority carrier hole concentration is %fd per cm cube',no,po)
+\ No newline at end of file