Here is a Python function that converts infix notation to postfix notation using a Stack data structure:

```python
def infix_to_postfix(infix_expression):
precedence = {'+':1, '-':1, '*':2, '/':2}
stack = [] # stack to hold operators
postfix = '' # resulting postfix expression

for char in infix_expression:
if char.isdigit(): # if the character is a digit, add it to the postfix expression
postfix += char
elif char in '+-*/': # if the character is an operator
while stack and stack[-1] in '+-*/' and precedence[char]

Question

Here is a Python function that converts infix notation to postfix notation using a Stack data structure:

```python
def infix_to_postfix(infix_expression):
    precedence = {'+':1, '-':1, '*':2, '/':2}
    stack = [] # stack to hold operators
    postfix = '' # resulting postfix expression

for char in infix_expression:
        if char.isdigit(): # if the character is a digit, add it to the postfix expression
            postfix += char
        elif char in '+-*/': # if the character is an operator
            while stack and stack[-1] in '+-*/' and precedence[char] <= precedence[stack[-1]]:
                postfix += stack.pop() # pop operators from the stack to the postfix expression
            stack.append(char) # push the current operator onto the stack
        elif char == '(':
            stack.append(char) # push '(' onto the stack
        elif char == ')':
            while stack and stack[-1] != '(':
                postfix += stack.pop() # pop operators from the stack to the postfix expression
            stack.pop() # pop '(' from the stack

while stack:
        postfix += stack.pop() # pop any remaining operators from the stack

return postfix
```

This function works by iterating over the characters in the infix expression. If a character is a digit, it is added to the postfix expression. If a character is an operator, it is pushed onto the stack. However, before pushing an operator onto the stack, any operators already on the stack that have greater or equal precedence are popped off the stack and added to the postfix expression. If a character is an open parenthesis, it is pushed onto the stack. If a character is a close parenthesis, operators are popped off the stack and added to the postfix expression until an open parenthesis is encountered. After all characters in the infix expression have been processed, any remaining operators on the stack are popped off and added to the postfix expression.

Knowee AI · Accepted Answer

Here is a Python function that converts infix notation to postfix notation using a Stack data structure:

```python
def infix_to_postfix(infix_expression):
    precedence = {'+':1, '-':1, '*':2, '/':2}
    stack = [] # stack to hold operators
    postfix = '' # resulting postfix expression

for char in infix_expression:
        if char.isdigit(): # if the character is a digit, add it to the postfix expression
            postfix += char
        elif char in '+-*/': # if the character is an operator
            while stack and stack[-1] in '+-*/' and precedence[char] <= precedence[stack[-1]]:
                postfix += stack.pop() # pop operators from the stack to the postfix expression
            stack.append(char) # push the current operator onto the stack
        elif char == '(':
            stack.append(char) # push '(' onto the stack
        elif char == ')':
            while stack and stack[-1] != '(':
                postfix += stack.pop() # pop operators from the stack to the postfix expression
            stack.pop() # pop '(' from the stack

while stack:
        postfix += stack.pop() # pop any remaining operators from the stack

return postfix
```

This function works by iterating over the characters in the infix expression. If a character is a digit, it is added to the postfix expression. If a character is an operator, it is pushed onto the stack. However, before pushing an operator onto the stack, any operators already on the stack that have greater or equal precedence are popped off the stack and added to the postfix expression. If a character is an open parenthesis, it is pushed onto the stack. If a character is a close parenthesis, operators are popped off the stack and added to the postfix expression until an open parenthesis is encountered. After all characters in the infix expression have been processed, any remaining operators on the stack are popped off and added to the postfix expression.

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