Which expression evaluates to 4.4 if integer p = 2?

Rationale

4 + p / 5.0 evaluates to 4.4 when p = 2.

When substituting p = 2 into the expression, it simplifies to 4 + 2 / 5.0, which equals 4 + 0.4, resulting in 4.4. This shows that choice D is the only expression that correctly evaluates to the desired value.

A (4 + p / 5) YOUR ANSWER

This expression evaluates to 4 + 2 / 5, which equals 4 + 0.4. However, since 5 is treated as an integer, the division results in integer division, yielding 4 + 0, which equals 4. Thus, it does not evaluate to 4.4.

B ((4 + p) / 5) YOUR ANSWER

Substituting p = 2 gives (4 + 2) / 5, which simplifies to 6 / 5. This results in 1.2, not 4.4, making this expression incorrect for the given condition.

C ((4 + p) / 5.0) YOUR ANSWER

This choice results in (4 + 2) / 5.0, which simplifies to 6 / 5.0. This evaluates to 1.2 as well, similar to choice B, and thus does not meet the requirement of yielding 4.4.

D (4 + p / 5.0) CORRECT

When substituting p = 2, this expression becomes 4 + 2 / 5.0. Here, the division is done with a float, leading to 4 + 0.4, which correctly results in 4.4.

Conclusion

The expression 4 + p / 5.0 is the only one that evaluates to 4.4 when p is set to 2, as it correctly accounts for floating-point division. The other choices either result from integer division or incorrect arithmetic, demonstrating that understanding the nuances of division in programming is crucial for accurate evaluations.

Which expression evaluates to 4.4 if integer p = 2?

4 + p / 5.0 evaluates to 4.4 when p = 2.

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