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Chapter 4: Problem 8

If the sub-expression on the left of the || logical operator is __________, the right sub-expression is not checked.

Short Answer

Expert verified
Answer: The right sub-expression is not checked when the left sub-expression is `true`.

Step by step solution

01

Understand the Logical OR Operator

The logical OR operator (||) returns true if at least one of the two sub-expressions is true. If the left sub-expression is true, it does not need to check the right sub-expression since the overall result is guaranteed to be true regardless of the value of the right sub-expression. This behavior is known as short-circuit evaluation.
02

Identify the Condition for Short-Circuit Evaluation

The right sub-expression of the '||' operator is not checked when the left sub-expression is already true. This is because, as mentioned earlier, if one of the sub-expressions is true, the overall expression will also be true, regardless of the value of the other sub-expression. Thus, the condition for skipping the right sub-expression is: if the left sub-expression is `true`.
03

Provide the Answer

The answer to the question is 'true.' If the sub-expression on the left of the || logical operator is `true`, the right sub-expression is not checked.

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