Word Count : 646

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To evaluate prefix and postfix expressions in C, stacks are the most appropriate data structures because both expression types rely on LIFO (Last In First Out) behavior for correct evaluation. In a prefix expression, operators precede operands, so evaluation proceeds from right to left, whereas in a postfix expression, operators follow operands, and evaluation proceeds from left to right. Using a stack allows operands to be stored temporarily, and operators can then apply operations on the top elements of the stack as they are encountered. For the prefix expression `+, -, , 3, 2, 7, 8, 4, 1`, the program reads the expression from right to left. __________ _____ __________ ________ __________.
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