disp('Ergastitio 2 - askisi 3')
datain=input('give three real numbers "[a,b,c]:"')
a=datain(1);
b=datain(2);
c=datain(3);

m=a;

if b<m
   m=b;
end

if c<m
   m=c;
end

disp(['the minimum value is ', num2str(m)])