write a user-defined function, called reverser, that takes a string, s, as input and returns a string that is that one in reverse.

In a situation where it is typically assumed that functions are built into the programme or environment, a user-defined function is a function that the user provides for the programme or environment. UDFs are often written to meet the needs of their author.What is user defined function ?User-defined functions are tools you can use to arrange your code within a policy's body. Once a function has been defined, it can be used in the same way that the built-in action and parser functions are used. Instead of being passed by value, variables are passed by reference to functions. This implies that altering a variable's value within a function also affects the variable's value across the entire policy.You can also declare and use your own functions inside of a policy. You can encapsulate and reuse functionality in your policy with the aid of user-defined functions.def reversed_string(s):   result = ""    for char in s:        result = char + result   return result>>> reversed_string("Hello, World!")'!dlroW ,olleH'To learn more about user defined function refer :https://brainly.com/question/20115245#SPJ4