Rust Programming Master Class from Beginner to Expert - Expression Evaluation (Postfix Evaluation)

This tutorial covers the evaluation of postfix expressions, building on the previous lesson about converting expressions to postfix form. It introduces two fundamental rules for converting postfix to infix and demonstrates their application through a detailed example. The tutorial concludes with a verification of the result using operation precedence rules and a preview of the next session, which will focus on implementing expression evaluation in Rust.

What is the primary focus of this tutorial?

• Learning about stack data structures

• Converting infix expressions to postfix

• Evaluating the result from a postfix expression

• Implementing algorithms in Python

What should you do when you encounter an operand in a postfix expression?

• Perform an operation with it

• Pop it from the stack

• Ignore it

• Push it onto the stack

When an operation is encountered in a postfix expression, what is the correct sequence of actions?

• Push two elements, perform the operation, pop the result

• Pop two elements, perform the operation, push the result

• Perform the operation, push the result, pop two elements

• Ignore the operation

In the given example, what is the result of dividing 45 by 3?

• 15

• 12

• 18

• 20

What is the final result of the evaluated postfix expression in the example?

• 50

• 198

• 148

• 165

Which operation has the highest precedence according to the mathematical rules discussed?

• Addition

• Subtraction

• Multiplication

• Division

What will be covered in the next tutorial?

• Introduction to data structures

• Advanced stack operations

• Implementation of expression evaluation in Rust

• Converting postfix to prefix expressions