diff --git a/lib/node_modules/@stdlib/math/base/special/heaviside/README.md b/lib/node_modules/@stdlib/math/base/special/heaviside/README.md
index 394facdae803..6da2cb6e7421 100644
--- a/lib/node_modules/@stdlib/math/base/special/heaviside/README.md
+++ b/lib/node_modules/@stdlib/math/base/special/heaviside/README.md
@@ -2,7 +2,7 @@
@license Apache-2.0
-Copyright (c) 2018 The Stdlib Authors.
+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.
@@ -164,6 +164,105 @@ logEachMap( 'H(%0.4f) = %0.4f', x, heaviside );
+
+
+* * *
+
+
+
+## C APIs
+
+
+
+
+
+
+
+
+
+
+
+### Usage
+
+```c
+#include "stdlib/math/base/special/heaviside.h"
+```
+
+#### stdlib_base_heaviside( x )
+
+Evaluate the [Heaviside function][heaviside-function].
+
+```c
+double out = stdlib_base_heaviside( 0.0, 0 );
+// returns 0.0
+
+out = stdlib_base_heaviside( 3.141592653589793 / 2.0, 0 );
+// returns 1.0
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] double` input value.
+- **continuity**: `[in] int` input value.
+
+```c
+double stdlib_base_heaviside( const double x, int continuity );
+```
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
+### Examples
+
+```c
+#include "stdlib/math/base/special/heaviside.h"
+#include
+
+int main( void ) {
+ const double x[] = { 0.0, -0.523, 0.785, -1.047, 3.14 };
+
+ double y;
+ int i;
+ for ( i = 0; i < 5; i++ ) {
+ y = stdlib_base_heaviside( x[ i ], STDLIB_HEAVISIDE_CONTINUITY_HALF );
+ printf( "heaviside(%lf, half-maximum) = %lf\n", x[ i ], y );
+ }
+
+ for ( i = 0; i < 5; i++ ) {
+ y = stdlib_base_heaviside( x[ i ], STDLIB_HEAVISIDE_CONTINUITY_LEFT );
+ printf( "heaviside(%lf, left-continuous) = %lf\n", x[ i ], y );
+ }
+
+ for ( i = 0; i < 5; i++ ) {
+ y = stdlib_base_heaviside( x[ i ], STDLIB_HEAVISIDE_CONTINUITY_RIGHT );
+ printf( "heaviside(%lf, right-continuous) = %lf\n", x[ i ], y );
+ }
+}
+```
+
+
+
+
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+