diff --git a/lib/node_modules/@stdlib/stats/base/dists/truncated-normal/pdf/README.md b/lib/node_modules/@stdlib/stats/base/dists/truncated-normal/pdf/README.md
index 26232640a149..df35ce06d99c 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/truncated-normal/pdf/README.md
+++ b/lib/node_modules/@stdlib/stats/base/dists/truncated-normal/pdf/README.md
@@ -145,6 +145,111 @@ for ( i = 0; i < 25; i++ ) {
+
+
+* * *
+
+
+
+## C APIs
+
+
+
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+
+
+### Usage
+
+```c
+#include "stdlib/stats/base/dists/truncated-normal/pdf.h"
+```
+
+#### stdlib_base_dists_truncated_normal_pdf( x, a, b , mu , sigma )
+
+Evaluates the r distribution function (pdf) for an truncated-normal distribution.
+
+```c
+double out = stdlib_base_dists_truncated_normal_pdf( 0.9, 0.0, 1.0, 0.0, 1.0 );
+// returns ~0.7795
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] double` input value.
+- **a**: `[in] double` lower limit.
+- **b**: `[in] double` upper limit.
+- **mu**: `[in] double` location parameter.
+- **sigma**: `[in] double` scale parameter.
+
+
+```c
+double stdlib_base_dists_truncated-normal_pdf( const double x, const double a, const double b , const double mu , const double sigma );
+```
+
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+
+### Examples
+
+```c
+#include "stdlib/stats/base/dists/truncated-normal/pdf.h"
+#include
+#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 a;
+ double b;
+ double mu;
+ double sigma;
+ double y;
+ int i;
+
+ for ( i = 0; i < 25; i++ ) {
+ x = random_uniform( -10.0, 10.0 );
+ a = random_uniform( -20.0, 0.0 );
+ b = random_uniform( a, a + 40.0 );
+ mu = random_uniform( a, b );
+ sigma = random_uniform( 0.1, 5.0 );
+ y = stdlib_base_dists_truncated_normal_pdf( x, a, b, mu, sigma );
+ printf( "x: %lf, a: %lf, b: %lf, mu: %lf, sigma: %lf, f(x;a,b,mu,sigma): %lf\n", x, a, b, mu, sigma, y );
+ }
+}
+```
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