Selection-WE6-P1

Section 3.13 Selection-WE6-P1

Subsection 3.13.1 Subgoals for Evaluating Selection Statements

Diagram which statements go together.
For if-statement, determine whether expression is true or false.
If true, follow true branch. If false, follow else branch (OR do nothing if there is no else branch).

Subsection 3.13.2 Select-WE6-P1

Exercises Exercises

1.

Click on the if-statement that must be TRUE in order to execute the line ``e = 3;`` in the following code.

                        if (x > y):
                    
{

                        if (a > b):
                    
      e = 1;

                        else:
                    
      e = 2;
}

                        else:
                    

                        if (a<b):
                    
      e = 3;

                        else:
                    
      e = 4;

2.

Click on the if-statement that must be FALSE in order to execute the line ``e = 2;`` in the following code.

                        if (x > y):
                    
{

                        if (a > b):
                    
      e = 1;

                        else:
                    
      e = 2;
}

                        else
                    

                        if (a<b):
                    
      e = 3;

                        else:
                    
      e = 4;

Use this given setup for each of the questions below.

int alpha = 2, beta = 1, delta = 3, eta = 0, gamma = 0;
double omega = 2.5, theta = -1.3, kappa = 3.0, lambda = 0.0, rho = 0.0;

3.

Q18: After executing the following code, the value in variable eta is .

4.

Q19: After executing the following code, the value in variable a is and the value in variable b is .

5.

Q20: After executing the following code, the value in variable x is and the value in variable y is .

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