1.1.1. Expressions-WE1-P1

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 all given problems below indicate if the code is valid or invalid. Each problem is independent of the others (e.g. Question 2 does not depend on Question 1, only the “Given” code).

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Expressions-WE1-P1

Given

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

Q1: alpha = beta;

• valid
• invalid

Q2: alpha = omega;

• valid
• invalid

Q3: theta = 22;

• valid
• invalid

Q4: omega = gamma;

• valid
• invalid

Q5: theta = lambda;

• valid
• invalid

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

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