@stdlib/math-base-special-ceiln

ceiln

Round a numeric value to the nearest multiple of 10^n toward positive infinity.

Installation

npm install @stdlib/math-base-special-ceiln

Usage

var ceiln = require( '@stdlib/math-base-special-ceiln' );

ceiln( x, n )

Rounds a numeric value to the nearest multiple of 10^n toward positive infinity.

// Round a value to 2 decimal places:
var v = ceiln( 3.141592653589793, -2 );
// returns 3.15

// If n = 0, `ceiln` behaves like `ceil`:
v = ceiln( 3.141592653589793, 0 );
// returns 4.0

// Round a value to the nearest thousand:
v = ceiln( 12368.0, 3 );
// returns 13000.0

Notes

• When operating on floating-point numbers in bases other than 2, rounding to specified digits can be inexact. For example,

  var x = 0.2 + 0.1;
  // returns 0.30000000000000004
  
  // Should round to 0.3:
  var v = ceiln( x, -16 );
  // returns 0.3000000000000001

Examples

var randu = require( '@stdlib/random-base-randu' );
var ceiln = require( '@stdlib/math-base-special-ceiln' );

var x;
var n;
var v;
var i;

for ( i = 0; i < 100; i++ ) {
    x = (randu()*100.0) - 50.0;
    n = ceiln( randu()*5.0, 0 );
    v = ceiln( x, -n );
    console.log( 'x: %d. Number of decimals: %d. Rounded: %d.', x, n, v );
}

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See Also

• @stdlib/math/base/special/ceil: round a double-precision floating-point number toward positive infinity.
• @stdlib/math/base/special/ceilb: round a numeric value to the nearest multiple of b^n toward positive infinity.
• @stdlib/math/base/special/floorn: round a numeric value to the nearest multiple of 10^n toward negative infinity.
• @stdlib/math/base/special/roundn: round a numeric value to the nearest multiple of 10^n.

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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

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License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.