// Exa 4.11
format('v',5)
clc;
clear;
close;
// Given data
alpha = 0.9;
I_E = 1;// mA
I_C = alpha * I_E;// in mA
// The base current,
I_B = I_E - I_C;// in mA
disp(I_B,"The value of base current in mA is");