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//Variable declaration
mewe=0.14; //mobility of electrons(m**2/Vs)
mewh=0.05; //mobility of holes(m**2/Vs)
e=1.6*10**-19;
ni=1.5*10**16; //intrinsic concentration(per m**3)
A=28.09; //atomic weight
D=2.33*10**3; //density(kg/m**3)
Na=6.025*10**26; //avagadro number
//Calculation
N=Na*D/A; //number of atoms(per m**3)
n=N/10**8; //electron concentration(per m**3)
p=ni**2/n; //hole concentration(per m**3)
sigma=e*((n*mewe)+(p*mewh)); //conductivity(per ohm m)
//Result
printf('conductivity is %0.3f per ohm m\n \n',(sigma) )
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