# Subgoals

## Section1.12Expressions-WE4-P2

### Subgoals for evaluating an assignment statement.

1. Determine resultant data type of expression
2. Update variable for pre operators based on side effect
3. Solve arithmetic equation, operator precedence
4. If = statement, is Left Hand Side (LHS) a variable? Check data type of copied value against data type of variable
5. Update variable for post operators based on side effect

### Subsection1.12.1

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


#### ExercisesExercises

##### 1.
Q27: lambda = alpha / kappa + delta;
What is the value of lambda? Round to 4 decimal points.
##### 2.
Q28: eta = alpha * beta + (omega – theta) * kappa;
Why is this statement invalid?
• cannot assign a double to an int variable
• eta does not have a value
• eta is a constant
• cannot assign an int to a double variable
Given
int r = 8;
double volume;

##### 3.
Q29: Which statement will calculate the volume of a sphere most accurately?
• volume = 4 / 3 * 3.14 * r * r * r;
• volume = 4 / 3 * 3.14159 * r * r * r;
• volume = 4.0 / 3 * 3.14 * r * r * r;
• An accurate result is not possible with these data types.