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clear//
//Variables
p = 20 * 10**-2 //Resistivity (in ohm-meter)
u = 100 * 10**-4 //mobility (in meter-square per volt-second)
q = 1.6 * 10**-19 //charge on electron (in Coulomb)
//Calculation
sig = 1/p //Conductivity (in per ohm-meter)
n = sig / (q * u) //number of electron carriers (in per cubic-meter)
//Result
printf("\n Number of electron carriers is %0.1f m**-3.",n)
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