1.1.2. Expressions-WE1-P2

Subgoals for evaluating an assignment statement

1. Determine resultant data type of expression

2. Update variable for pre-increment or pre-decrement operators (side effect)

3. Evaluate arithmetic expression according to operator precedence

4. If an assignment statement (=), is Left Hand Side (LHS) a variable? Check data type of value against data type of variable.

5. Update variable for post-increment or post-decrement operators (side effect)

For the assignment statements below, either give the new value of the assigned variable, or enter “invalid” if the statement would result in a compiler error or using an undefined value. Each problem is independent of the others (e.g. Question 2 does not depend on Question 1, only the “Given” code).

---

Expressions-WE1-P2

Given

int alpha, beta = 1, gamma;
double omega = 2.5, theta, lambda;

Q6: alpha = beta;

What is the value of alpha?

Q7: alpha = omega;

• cannot assign a double to an int variable
• lambda does not have a value
• omega does not have a value
• cannot assign an int to a double variable

Q8: theta = 22;

What is the value of theta?

Q9: omega = beta;

What is the value of omega?

Q10: theta = lambda;

Why is this statement invalid?

• cannot assign a double to an int variable
• lambda does not have a value
• theta does not have a value
• cannot assign an int to a double variable

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

You have attempted of activities on this page