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

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@license Apache-2.0
Copyright (c) 2018 The Stdlib Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
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# roundsd
> Round a numeric value to the nearest number with `n` significant figures.
<section class="usage">
## Usage
```javascript
var roundsd = require( '@stdlib/math/base/special/roundsd' );
```
#### roundsd( x, n\[, b] )
Rounds a `numeric` value to the nearest `number` with `n` significant figures.
```javascript
var v = roundsd( 3.141592653589793, 3 );
// returns 3.14
v = roundsd( 3.141592653589793, 1 );
// returns 3.0
v = roundsd( 12368.0, 2 );
// returns 12000.0
```
The default base is `10` (decimal). To round using a different base, provide a third argument.
```javascript
var v = roundsd( 0.0313, 2, 2 );
// returns 0.03125
```
</section>
<!-- /.usage -->
<section class="notes">
</section>
<!-- /.notes -->
<section class="examples">
## Examples
<!-- eslint no-undef: "error" -->
```javascript
var randu = require( '@stdlib/random/base/randu' );
var roundsd = require( '@stdlib/math/base/special/roundsd' );
var x;
var y;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*10000.0) - 5000.0;
y = roundsd( x, 5 );
console.log( 'x: %d. Rounded: %d.', x, y );
}
```
</section>
<!-- /.examples -->
<section class="links">
</section>
<!-- /.links -->