@stdlib/constants-float64-max-safe-nth-lucas

Maximum safe nth Lucas number when stored in double-precision floating-point format.

Usage no npm install needed!

<script type="module">
  import stdlibConstantsFloat64MaxSafeNthLucas from 'https://cdn.skypack.dev/@stdlib/constants-float64-max-safe-nth-lucas';
</script>

README

Lucas Number

NPM version Build Status Coverage Status

Maximum safe nth Lucas number when stored in double-precision floating-point format.

Installation

npm install @stdlib/constants-float64-max-safe-nth-lucas

Usage

var FLOAT64_MAX_SAFE_NTH_LUCAS = require( '@stdlib/constants-float64-max-safe-nth-lucas' );

FLOAT64_MAX_SAFE_NTH_LUCAS

The maximum safe nth Lucas number when stored in double-precision floating-point format.

var bool = ( FLOAT64_MAX_SAFE_NTH_LUCAS === 76 );
// returns true

Examples

var FLOAT64_MAX_SAFE_NTH_LUCAS = require( '@stdlib/constants-float64-max-safe-nth-lucas' );

var v;
var i;

function lucas( n ) {
    var a;
    var b;
    var c;
    var i;

    a = 2;
    if ( n === 0 ) {
        return a;
    }
    b = 1;
    for ( i = 2; i <= n; i++ ) {
        c = a + b;
        a = b;
        b = c;
    }
    return b;
}

for ( i = 0; i < 100; i++ ) {
    v = lucas( i );
    if ( i > FLOAT64_MAX_SAFE_NTH_LUCAS ) {
        console.log( 'Unsafe: %d', v );
    } else {
        console.log( 'Safe:   %d', v );
    }
}

See Also

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

Chat

License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.