// Scilab Code Ex5.3: Page-177 (2006)
clc; clear;
n_Na = 2.65e+22;    // electronic concentration of Na, per cm cube
k_F = (3*%pi^2*n_Na)^(1/3);    // Fermi wave vector, per cm
printf("\nThe fermi momentum of Na = %4.2e per cm", k_F);

// Result
// The fermi momentum of Na = 9.22e+07 per cm