What is meaning of this que

#1

Here is an infix expression:

4 + 3*(6*3-12)
Suppose that we are using the usual stack algorithm to convert the expression from infix to postfix notation. The maximum number of symbols that will appear on the stack AT ONE TIME during the conversion of this expression?

#2

@guptanikhil898,
Have you done infix to postfix conversion using stack?

#3

no,i dont kow what is infix to postfix mean

#4

@guptanikhil898,
Link.