Postfix To Prefix Conversion

Example:
 Postfix : ab+c*ef+g/+
 Prefix  : +*+abc/+efg
 Postfix : abc*de-/+
 Prefix  : +a/*bc-de

To convert an expression from postfix notation to prefix notation, you can follow these steps:

1. Start by scanning the expression from left to right.
2. If the current element is an operand, push it onto a stack.
3. If the current element is an operator, pop the top two elements from the stack, and concatenate the operator and the operands in reverse order to form a new string. Push this string onto the stack.
4. Continue scanning the expression until you have processed all the elements.
5. The final string left on the stack is the prefix notation of the original expression.

Here given code implementation process.

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