Answer 1

as we already know, the do while function is executed at least once. When the function is invoked in the variable z, it writes 1 + 1 and the variable x is incremented by ++x. z + = x + y = 2 + 2 + 1 = 5.

Answer 2

The first program is recursion. The function calls itself up to the base case which is m = 1. This is factorial. In function, you pass 4 as an argument. it works in that order. 4! = 4 * 3 * 2 * 1.

Answer 3

the first one simply returns the factorial of m --> 4! = 24

Answer 4

unlike a regular while loop a do while loop executes atleast once even if the condition in the while loop is false

Answer 5

Have you ever heard about recursion?

Answer 6

have you ever heard the term factorial?