time-to-botec/squiggle/node_modules/@stdlib/math/base/special/trunc/README.md

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# Truncate

> Round a double-precision floating-point number toward zero.

<section class="usage">

## Usage

```javascript
var trunc = require( '@stdlib/math/base/special/trunc' );
```

#### trunc( x )

Rounds a double-precision floating-point number toward zero.

```javascript
var v = trunc( -4.2 );
// returns -4.0

v = trunc( 9.99999 );
// returns 9.0

v = trunc( 0.0 );
// returns 0.0

v = trunc( -0.0 );
// returns -0.0

v = trunc( NaN );
// returns NaN

v = trunc( Infinity );
// returns Infinity

v = trunc( -Infinity );
// returns -Infinity
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var randu = require( '@stdlib/random/base/randu' );
var trunc = require( '@stdlib/math/base/special/trunc' );

var x;
var i;

for ( i = 0; i < 100; i++ ) {
    x = (randu()*100.0) - 50.0;
    console.log( 'trunc(%d) = %d', x, trunc( x ) );
}
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/math/base/special/trunc.h"
```

#### stdlib_base_trunc( x )

Rounds a double-precision floating-point number toward zero.

```c
double y = stdlib_base_trunc( 3.14 );
// returns 3.0
```

The function accepts the following arguments:

-   **x**: `[in] double` input value.

```c
double stdlib_base_trunc( const double x );
```

</section>

<!-- /.usage -->

<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

<!-- C API usage examples. -->

<section class="examples">

### Examples

```c
#include "stdlib/math/base/special/trunc.h"
#include <stdio.h>

int main() {
    double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };

    double y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_trunc( x[ i ] );
        printf( "trunc(%lf) = %lf\n", x[ i ], y );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

<section class="links">

</section>

<!-- /.links -->