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Select the correct answerWhich of these operators can skip evaluating right hand operand?Options&|!&&

Question

Select the correct answer

Which of these operators can skip evaluating right hand operand?

Options:

  • &
  • |
  • !
  • &&
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Solution

Break Down the Problem

  1. Identify the operators provided in the options: &, |, !, &&.
  2. Understand the behavior of each operator with respect to short-circuit evaluation.

Relevant Concepts

  1. Short-Circuit Operators: In programming, some operators can skip evaluating their right-hand operand based on the result of the left-hand operand. The two main types of these operators are:
    • Logical AND (&&): If the left operand is false, the right operand is not evaluated.
    • Logical OR (||): If the left operand is true, the right operand is not evaluated.

Analysis and Detail

  1. && (Logical AND):

    • If the left operand is false, the expression evaluates to false without evaluating the right operand.
    • Example: false && (doSomething()) will skip doSomething().
  2. || (Logical OR):

    • If the left operand is true, the expression evaluates to true without evaluating the right operand.
    • Example: true || (doSomething()) will skip doSomething().
  3. & (Bitwise AND) and | (Bitwise OR):

    • Both operators always evaluate both operands, regardless of their values.
  4. ! (Logical NOT):

    • This operator negates the value of the operand and does not evaluate a second operand.

Verify and Summarize

  1. From the analysis, the operators that can skip the evaluation of their right-hand operand are && and ||.
  2. However, the question specifies the operators given in the options. Therefore, the only operator among the provided options that can skip evaluating the right-hand operand is &&.

Final Answer

The operator that can skip evaluating the right-hand operand is &&.

This problem has been solved

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