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+clear
+//
+//
+//
+
+//Variable declaration
+e=1.6*10**-19
+Eg=0.72 //band gap(eV)
+k=1.38*10**-23 //boltzmann constant
+T1=293 //temperature(K)
+T2=313 //temperature(K)
+sigma1=2 //conductivity(mho m-1)
+
+//Calculation
+x=(Eg*e/(2*k))*((1/T1)-(1/T2))
+y=(x/2.303)
+
+z=(log10(sigma1))
+
+log_sigma2=y+z
+sigma2=10**log_sigma2 //conductivity(mho m-1)
+
+//Result
+printf("\n conductivity is %0.2f mho m-1",sigma2)