//Given that
T = 300  //in K
e = 1.6*10^-19  //in coulomb
Eg = 5.5*e  //in J
K = 8.62*10^-5*e  //in J/K

//Sample Problem 42-1
printf("**Sample Problem 42-1**\n")
P = %e^(-Eg/(K*T))
printf("The probability is equal to %e", P)