clear // // // //Variable declaration e=1.6*10**-19 //charge(coulomb) epsilon0=8.85*10**-12 r0=0.281*10**-9 //equilibrium distance(m) I=5.14 //ionisation energy(eV) EA=-3.61 //electron affinity(eV) //Calculation V=-(e**2)/(4*e*%pi*epsilon0*r0) //potential(eV) CE=I+EA+V //cohesive energy of molecule(eV) //Result printf("\n cohesive energy of molecule is %0.2f eV",CE)