An interactive introduction to MATLAB

52 decision making

Self Test Exercise: The if-else statement

Evaluate the following expressions without usingMATLAB.

1. Which of the following shows a correctif,elsestatement?
   a).
   1 a = input('a? ')
   2 If a < 0
   3 disp('a is negative')
   4 ELSEIF a == 0
   5 disp('a is equal to zero')
   6 Else
   7 disp('a is positive')
   8 END

b).

1 a = input('a? ')

2 if a < 0

3 disp('a is negative')

4 elseif a = 0

5 disp('a is equal to zero')

6 else

7 disp('a is positive')

8 end

c).

1 a = input('a? ')

2 if a < 0

3 disp('a is negative')

4 elseif a == 0

5 disp('a is equal to zero')

6 else

7 disp('a is positive')

8 end

d).

1 a = input('a? ')

2 if a < 0

3 disp('a is negative')

4 else if a = 0

5 disp('a is equal to zero')

6 else

7 disp('a is positive')

8 end