// Scilab Code Ex3.9 : Page-73 (2010)
x = 0.002945;    // Distance through which movable mirror is shifted, cm
N = 100;    // Number of fringes shifted
lambda = 2*x/N;    // Wavelength of light, m
printf("\nThe wavelength of light = %4d angstrom", lambda/1e-008);

// Result 
// The wavelength of light = 5890 angstrom