//Example No.6.1
//Page No.185.
clc;clear;
Mc = 12;// Mc is the mass of one carbon atom.
r = 0.071*10^(-9);//radius -[m].
D = ((8*Mc)/(6.022*10^(26)*((8*r)/(sqrt(3)))^(3)));//density of the diamond.
printf("\nThe density of diamond is %.1f kg/m^3",D);