diff --git a/lib/node_modules/@stdlib/math/base/assert/is-nonnegative-integer/README.md b/lib/node_modules/@stdlib/math/base/assert/is-nonnegative-integer/README.md
index bfbe7da594fa..9072d77b8707 100644
--- a/lib/node_modules/@stdlib/math/base/assert/is-nonnegative-integer/README.md
+++ b/lib/node_modules/@stdlib/math/base/assert/is-nonnegative-integer/README.md
@@ -110,6 +110,97 @@ bool = isNonNegativeInteger( NaN );
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+* * *
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+
+## C APIs
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+### Usage
+
+```c
+#include "stdlib/math/base/assert/is_nonnegative_integer.h"
+```
+
+#### stdlib_base_is_nonnegative_integer( x )
+
+Tests if a finite [double-precision floating-point number][ieee754] is a nonnegative integer.
+
+```c
+bool out = stdlib_base_is_nonnegative_integer( 1.0 );
+// returns true
+
+out = stdlib_base_is_nonnegative_integer( -10.0 );
+// returns false
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] double` input value.
+
+```c
+bool stdlib_base_is_nonnegative_integer( const double x );
+```
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+### Examples
+
+```c
+#include "stdlib/math/base/assert/is_nonnegative_integer.h"
+#include
+#include
+#include
+
+int main( void ) {
+ double x;
+ bool v;
+ int i;
+
+ for ( i = 0; i < 100; i++ ) {
+ x = ( ( (double)rand() / (double)RAND_MAX ) * 100.0 ) - 50.0;
+ v = stdlib_base_is_nonnegative_integer( x );
+ printf( "x = %lf, is_nonnegative_integer(x) = %s\n", x, ( v ) ? "true" : "false" );
+ }
+}
+```
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