diff --git a/lib/node_modules/@stdlib/math/base/special/digamma/README.md b/lib/node_modules/@stdlib/math/base/special/digamma/README.md
index d43cc085409c..ab46b4a40f75 100644
--- a/lib/node_modules/@stdlib/math/base/special/digamma/README.md
+++ b/lib/node_modules/@stdlib/math/base/special/digamma/README.md
@@ -115,6 +115,95 @@ for ( i = 0; i < 10; i++ ) {
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+* * *
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+## C APIs
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+### Usage
+
+```c
+#include "stdlib/math/base/special/digamma.h"
+```
+
+#### digamma( x )
+
+Evaluates the [digamma function][digamma-function].
+
+```c
+double out = digamma( -2.5 );
+// returns ~1.103
+
+out = digamma( 1.0 );
+// returns ~-0.577
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] double` input value.
+
+```c
+double digamma( const double x );
+```
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+### Examples
+
+```c
+#include "stdlib/math/base/special/digamma.h"
+#include
+#include
+
+int main( void ) {
+ const double x[] = { 4.0, -1.5, -0.5, 0.5 };
+
+ double y;
+ int i;
+ for ( i = 0; i < 4; i++ ) {
+ y = stdlib_base_digamma( x[ i ] );
+ printf( "digamma(%lf) = %lf\n", x[ i ], y );
+ }
+}
+```
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