## How do you subtract two expressions?

To add or subtract two rational expressions with the same denominator, we simply add or subtract the numerators and write the result over the common denominator. When the denominators are not the same, we must manipulate them so that they become the same. In other words, we must find a common denominator.

## How do you add or subtract functions?

To add or subtract functions, just add or subtract the values at each point where it makes sense. If the functions are given by formulas, you can just add or subtract the formulas (it doesn’t matter whether you plug in values before or after).

## What is the difference of two functions?

The Difference of Two Functions (f − g)(x) = f(x) − g(x), where x is in the domain of both f and g. The domain of the (f − g)(x) consists of all x-values that are in the domain of both f and g.

## When a method calls itself this is called?

Simply stated, recursion is when a function (or procedure) calls itself. Such a function is called “recursive”.

## Why stack is used for recursion?

Thus in recursion last function called needs to be completed first. Now Stack is a LIFO data structure i.e. ( Last In First Out) and hence it is used to implement recursion. that provides support for recursion use stack for book keeping.

## Can a function call itself C++?

The main() function can call itself in C++. This is an example of recursion as that means a function calling itself.

## Can we typecast void into int?

You’re return ing the value of int sum by setting a void * address to it. But, if you keep that in mind and get the value of sum by casting a void * to int it will work.

## What is default argument function in C++?

A default argument is a value provided in a function declaration that is automatically assigned by the compiler if the caller of the function doesn’t provide a value for the argument with a default value. When Function overloading is done along with default values.

## What do you mean by default argument?

In computer programming, a default argument is an argument to a function that a programmer is not required to specify. In most programming languages, functions may take one or more arguments. Usually, each argument must be specified in full (this is the case in the C programming language).

## What is default argument in function illustrate with example?

Default arguments in Python functions are those arguments that take default values if no explicit values are passed to these arguments from the function call. Let’s define a function with one default argument. def find_square(integer1=2): result = integer1 * integer1 return result.

## How are default arguments passed to functions?

The default arguments are used when you provide no arguments or only few arguments while calling a function. If you pass only one argument like this: sum(80) then the result would be 100, using the passed argument 80 as first value and 20 taken from the default argument.