diff --git a/lib/node_modules/@stdlib/stats/base/dists/lognormal/logpdf/README.md b/lib/node_modules/@stdlib/stats/base/dists/lognormal/logpdf/README.md
index 24859b2b9a4a..bf70ae4841ef 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/lognormal/logpdf/README.md
+++ b/lib/node_modules/@stdlib/stats/base/dists/lognormal/logpdf/README.md
@@ -134,6 +134,112 @@ logEachMap( 'x: %0.4f, µ: %0.4f, σ: %0.4f, ln(f(x;µ,σ)): %0.4f', x, mu, sigm
+
+
+* * *
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+
+## C APIs
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+
+### Usage
+
+```c
+#include "stdlib/stats/base/dists/lognormal/logpdf.h"
+```
+
+#### stdlib_base_dists_lognormal_logpdf( x, mu, sigma )
+
+Evaluates the natural logarithm of the probability density function (PDF) for a lognormal distribution.
+
+```c
+double y = stdlib_base_dists_lognormal_logpdf( 2.0, 0.0, 1.0 );
+// returns ~-1.852
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] double` input value.
+- **mu**: `[in] double` location parameter.
+- **sigma**: `[in] double` scale parameter.
+
+```c
+double stdlib_base_dists_lognormal_logpdf( const double x, const double mu, const double sigma );
+```
+
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+### Examples
+
+```c
+#include "stdlib/stats/base/dists/lognormal/logpdf.h"
+#include
+#include
+
+static double random_uniform( const double min, const double max ) {
+ double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+ return min + ( v*(max-min) );
+}
+
+int main( void ) {
+ double x;
+ double mu;
+ double sigma;
+ double y;
+ int i;
+
+ for ( i = 0; i < 25; i++ ) {
+ x = random_uniform( 0.0, 100.0 );
+ mu = random_uniform( -10.0, 10.0 );
+ sigma = random_uniform( 0.1, 10.0 );
+ y = stdlib_base_dists_lognormal_logpdf( x, mu, sigma );
+ printf( "x: %lf, mu: %lf, sigma: %lf, ln(f(x;mu,sigma)): %lf\n", x, mu, sigma, y );
+ }
+}
+```
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