Fn_2=0;
Fn_1=1;
n=1;
disp('F0=0')
disp('F1=1')

while n<49
n=n+1;
F_n=Fn_2+Fn_1;
disp(['F' num2str(n) '=' num2str(F_n)])
Fn_2=Fn_1;
Fn_1=F_n;
end