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+
+//Variable declaration
+mewe=0.36; //mobility of electrons(m**2/Vs)
+mewh=0.17; //mobility of holes(m**2/Vs)
+e=1.6*10**-19;
+rhoi=2.12; //resistivity(ohm m)
+
+//Calculation
+ni=1/(rhoi*e*(mewe+mewh)); //intrinsic concentration(per m**3)
+
+//Result
+printf('intrinsic concentration is %0.3f *10**16 per m**3 \n',(ni/10**16)) \ No newline at end of file