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roundsd
Round a numeric value to the nearest number with
n
significant figures.
Installation
npm install @stdlib/mathbasespecialroundsd
Usage
var roundsd = require( '@stdlib/mathbasespecialroundsd' );
roundsd( x, n[, b] )
Rounds a numeric
value to the nearest number
with n
significant figures.
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.
var v = roundsd( 0.0313, 2, 2 );
// returns 0.03125
Examples
var randu = require( '@stdlib/randombaserandu' );
var roundsd = require( '@stdlib/mathbasespecialroundsd' );
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 );
}
See Also

@stdlib/mathbase/special/ceilsd
: round a numeric value to the nearest number toward positive infinity with N significant figures. 
@stdlib/mathbase/special/floorsd
: round a numeric value to the nearest number toward negative infinity with N significant figures. 
@stdlib/mathbase/special/round
: round a numeric value to the nearest integer. 
@stdlib/mathbase/special/truncsd
: round a numeric value to the nearest number toward zero with N significant figures.
Notice
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
License
See LICENSE.
Copyright
Copyright © 20162024. The Stdlib Authors.