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** llabs()** is another type of

`abs()`

function in which both the type of input and output is `long long int`

or `long long`

. In other words, it can be considered as a `long long int`

version of the `abs()`

function.The illustration below shows the C++ equivalent of the mathematical expression:

C++ representation of the mathematical expression

In order to use the `llabs()`

function, we must include `cstdlib`

in the program, as shown below:

```
#include <cstdlib>
```

```
long long llabs(long long x)
long long int llabs(long long int x)
```

This function takes in a single parameter of type `long long`

or `long long int`

.

`llabs()`

returns the absolute value of `long long`

or `long long int`

sent as a parameter.

#include <iostream> #include <cstdlib> using namespace std; int main() { long long int number_1 = -2394545329003567669LL; long long number_2 = -89187008890LL; cout << "llabs(" << number_1 << ") = |" << number_1 << "| = " << llabs(number_1); cout << endl; cout << "llabs(" << number_2 << ") = |" << number_2 << "| = " << llabs(number_2); return 0; }

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