3.2.1. Selection-WE2-P1

Subgoals for Evaluating Selection Statements

1. Diagram which statements go together.

2. For if-statement, determine whether expression is true or false.

3. If true, follow true branch. If false, follow else branch (OR do nothing if there is no else branch).

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Select-WE2-P1

Each question below is independent, but they all use this given setup

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;

Q6: What is the output of the following code?

int x = 0;
if (x = 0)  /* look closely! */
   System.out.println("0 is true");
else
   System.out.println("0 is false");

• 0 is true
• 0 is false
• There is no output because a compiler error occurs
• There is no output because an exception occurs

Q7: What is the output of the following code?

if (false)
   System.out.println("it is true");
else
   System.out.println("it is false");

• it is true
• it is false
• There is no output because a compiler error occurs
• There is no output because an exception occurs

Q8: What is the output of the following code?

if (12 < 12)
   System.out.println("Never");
else
   System.out.println("Always");

• Never
• Always
• There is no output because a compiler error occurs
• There is no output because an exception occurs

Q9: What is the output of the following code?

double var1 = 15.0;
double var2 = 25.12;
if (2 * var1 >= var2)
   System.out.println("O.K.");
else
   System.out.println("Not O.K.");

• O.K.
• Not O.K.
• There is no output because a compiler error occurs
• There is no output because an exception occurs

public class main{ public static void main(String args[]){ } }

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