An interactive introduction to MATLAB

4.2the if-else statement 53

2. †What will the following code print?
   1 a = 10;
   2 if a ~= 0
   3 disp('a is not equal to zero')
   4 end


3. †What will the following code print?
   1 a = 10;
   2 if a > 0
   3 disp('a is positive')
   4 else
   5 disp('a is not positive')
   6 end


4. †What will the following code print?
   1 a = 5;
   2 b = 3;
   3 c = 2;
   4 if a < b*c
   5 disp('Hello world')
   6 else
   7 disp('Goodbye world')
   8 end


5. †For what values of the variable will the following code printHello world?
   1 if a >= 0 & a < 7
   2 disp('Hello world')
   3 else
   4 disp('Goodbye world')
   5 end


6. †For what values of the variable will the following code printHello world?
   1 if a < 7 | a >= 3
   2 disp('Hello world')
   3 else
   4 disp('Goodbye world')
   5 end

†Questions from Morrell, D., Programming with M-files: If-Statement Drill Exercises , Connex-
ions, http://cnx.org/content/m13432/1.4/, [Last assessed: Nov 2011]