//Ex3_5
clc
e = -1.6*10^-19
n = 10^6
v = 5*10^6
J = n*e*v
disp("e = "+string(e)+"C")//charge of electrons
disp("n = "+string(n)+" /m-cube")//electron density
disp("v = "+string(v)+"m/s")//electron velocity
disp("J = nev = "+string(abs(J))+"A/m-sq")//current density