Question

solve the given postfix expression 21-4+3*

Answer 1

Answer:

20 is the answer hope it help

Answer 2

Concept:

A postfix expression is where the operator is not between the two operands where it will operate, in a postfix expression the operator we put is after the two operands it has to perform.

For example, (2 1 - ), here  ' - ' will operate on 2 and 1

Given:

A postfix expression 2 1 - 4 + 3 *

Find:

Solve the given postfix expression

Solution:

The postfix expression is 2 1 - 4 + 3 *

Now, we start from the leftmost operator which is ' - ' and it will operate on 2 and 1 so we will get,

(2 - 1)

= 1

Now, the expression is,

1 4 + 3 *

Again, operator ' + ' will operate on 1 and 4 we will get,

(1 + 4)

= 5

So now the expression is,

5 3 *

Finally,  ' * ' will operate on 5 and 3 we will get,

(5 * 3)

= 15

Final answer:

By solving the given postfix expression we get 15 as our final answer.

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