How to determine whether a number is complex?

Task:

Verify evec1(2) and evec2(2) are real and print out. There is no output?

if imag(evec1(2))==0   
if imag(evec2(2))==0 
V1=10; 
if evec1(1) ~= 0 
  V1=evec1(2)/evec1(1);
  end;
V2=10;
if evec2(1) ~= 0
   V2=evec2(2)/evec2(1);
   end;
fprintf( 'V1=%.0f  V2=%.0f\n', V1,V2 )

Can you help please? Thank you. MM