feat: add constants/float32/eulergamma

lib/node_modules/@stdlib/constants/float32/eulergamma/README.md

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+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2025 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
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-->
+
+# FLOAT32_EULERGAMMA
+
+> The [Euler-Mascheroni][eulergamma] constant.
+
+<section class="intro">
+
+The [Euler-Mascheroni][eulergamma] constant `gamma` (also known as "Euler's constant" or "the Euler constant") is defined as the limit of the sequence
+
+<!-- <equation class="equation" label="eq:eulergamma_constant" align="center" raw="\gamma = \lim_{n\to\infty} \left( \sum_{k=1}^n \frac{1}{k} - \ln n \right)" alt="Equation for the Euler-Mascheroni constant."> -->
+
+```math
+\gamma = \lim_{n\to\infty} \left( \sum_{k=1}^n \frac{1}{k} - \ln n \right)
+```
+
+<!-- <div class="equation" align="center" data-raw-text="\gamma = \lim_{n\to\infty} \left( \sum_{k=1}^n \frac{1}{k} - \ln n \right)" data-equation="eq:eulergamma_constant">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@6e1cf583c4854b3d982f22f361f53a30c9f552dc/lib/node_modules/@stdlib/constants/float64/eulergamma/docs/img/equation_eulergamma_constant.svg" alt="Equation for the Euler-Mascheroni constant.">
+    <br>
+</div> -->
+
+<!-- </equation> -->
+
+</section>
+
+<!-- /.intro -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var FLOAT32_EULERGAMMA = require( '@stdlib/constants/float32/eulergamma' );
+```
+
+#### FLOAT32_EULERGAMMA
+
+The [Euler-Mascheroni][eulergamma] constant.
+
+```javascript
+var bool = ( FLOAT32_EULERGAMMA === 0.5772156715393066 );
+// returns true
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="examples">
+
+## Examples
+
+<!-- TODO: better example -->
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var FLOAT32_EULERGAMMA = require( '@stdlib/constants/float32/eulergamma' );
+
+console.log( FLOAT32_EULERGAMMA );
+// => 0.5772156715393066
+```
+
+</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/constants/float32/eulergamma.h"
+```
+
+#### STDLIB_CONSTANT_FLOAT32_EULERGAMMA
+
+Macro for the [Euler-Mascheroni][eulergamma] constant.
+
+</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">
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+[eulergamma]: http://mathworld.wolfram.com/Euler-MascheroniConstant.html
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/constants/float32/eulergamma/docs/repl.txt

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+
+{{alias}}
+    The Euler-Mascheroni constant.
+
+    Examples
+    --------
+    > {{alias}}
+    0.5772156715393066
+
+    See Also
+    --------
+

lib/node_modules/@stdlib/constants/float32/eulergamma/docs/types/index.d.ts

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+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 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
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* The Euler-Mascheroni constant.
+*
+* @example
+* var val = FLOAT32_GAMMA;
+* // returns 0.5772156715393066
+*/
+declare const FLOAT32_EULERGAMMA: number;
+
+
+// EXPORTS //
+
+export = FLOAT32_EULERGAMMA;

lib/node_modules/@stdlib/constants/float32/eulergamma/docs/types/test.ts

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+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 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
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import FLOAT32_EULERGAMMA = require( './index' );
+
+
+// TESTS //
+
+// The export is a number...
+{
+	// eslint-disable-next-line @typescript-eslint/no-unused-expressions
+	FLOAT32_EULERGAMMA; // $ExpectType number
+}

lib/node_modules/@stdlib/constants/float32/eulergamma/examples/index.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 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
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var FLOAT32_EULERGAMMA = require( './../lib' );
+
+console.log( FLOAT32_EULERGAMMA );
+// => 0.5772156715393066

lib/node_modules/@stdlib/constants/float32/eulergamma/include/stdlib/constants/float32/eulergamma.h

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 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
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#ifndef STDLIB_CONSTANTS_FLOAT32_EULERGAMMA_H
+#define STDLIB_CONSTANTS_FLOAT32_EULERGAMMA_H
+
+/**
+* Macro for the Euler-Mascheroni constant.
+*/
+#define STDLIB_CONSTANT_FLOAT32_EULERGAMMA 0.5772156649015328606f
+
+#endif // !STDLIB_CONSTANTS_FLOAT32_EULERGAMMA_H