# abs in c++ used for

The `abs`

function in C++ is used to calculate the absolute value of a number. It returns the magnitude of a given value without considering its sign. The function is defined in the `<cstdlib>`

header file.

Here are the steps involved in using the `abs`

function in C++:

- Include the
`<cstdlib>`

header file: To use the`abs`

function, you need to include the`<cstdlib>`

header file in your program. This header file contains the declaration of the`abs`

function.

```
#include <cstdlib>
```

- Call the
`abs`

function: To calculate the absolute value of a number, you need to call the`abs`

function and pass the number as an argument. The function can accept various numeric data types, such as`int`

,`long`

,`float`

,`double`

, etc.

```
int number = -5;
int absoluteValue = abs(number);
```

In the above example, the `abs`

function is called with the variable `number`

as an argument. The return value of the function is stored in the variable `absoluteValue`

.

- Use the absolute value: Once the
`abs`

function is called, it calculates the absolute value of the given number and returns it. You can then use this value in your program as needed.

```
std::cout << "Absolute value: " << absoluteValue << std::endl;
```

In the above example, the calculated absolute value is printed to the console using the `std::cout`

statement.

That's it! You have now successfully used the `abs`

function in C++ to calculate the absolute value of a number. Keep in mind that the `abs`

function only returns the magnitude of the number and does not consider its sign.