// Example No.6.13.
// Page No.191.
//To find the nearest neighbour distance.
clc;clear;
disp('i)Simple cubic unit cell');
disp('The nearest neighbour distance is a');//nearest neighbour distance.
disp('ii)Body-centered cubic unit cell');
disp('2r = (0.866)a');
disp('iii)Face-centered cubic unit cell');
disp('2r = (0.7071)a');

//As there are no numerical steps and hence the display statement has been typed directly.