What is the value of the postfix expression 6 8 2 1 + – *: Answer choicesSelect only one optionREVISIT-301620-40
Question
What is the value of the postfix expression 6 8 2 1 + – *: Answer choicesSelect only one optionREVISIT-301620-40
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Solution 1
The postfix expression is evaluated using a stack. Here are the steps:
- Push 6 onto the stack.
- Push 8 onto the stack.
- Push 2 onto the stack.
- Push 1 onto the stack.
- Encounter '+', so pop 1 and 2 from the stack, add them together (1 + 2 = 3), and push the result back onto the stack.
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