disp("Eg=1.420+(1.087*x)+(0.438*x^2)");
x=800*10^-9;
Eg=1.420+(1.087*x)+(0.438*x^2);
printf('\n The value of Eg is %feV',Eg);
printf('\n');
disp("The corresponding bandgap value for x=800nm from Eg(x) is 0.11");