What is the result of the postfix expression 6 2 3 + *?

Options

  • A. 30
  • B. 18
  • C. 24
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

A. 30

Detailed Explanation

The postfix expression 6 2 3 + * is evaluated using a stack. First push 6, 2, and 3. The + operator combines 2 and 3 to produce 5. The stack now effectively contains 6 and 5. The * operator then multiplies them: 6 × 5 = 30. Thus, the answer is 30. This example demonstrates why postfix notation is convenient for computers: operator precedence and parentheses are unnecessary during direct stack-based evaluation.
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