diff --git a/ApiWorksheetFunction_STDEV_P.js b/ApiWorksheetFunction_STDEV_P.js
new file mode 100644
index 0000000..3ee9431
--- /dev/null
+++ b/ApiWorksheetFunction_STDEV_P.js
@@ -0,0 +1,19 @@
+builder.CreateFile("xlsx");
+const oWorksheet = Api.GetActiveSheet();
+
+var valueArr = [
+  3, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 1, 13, 14, 3, 5, 17, 18,
+];
+
+// Place the numbers in cells
+for (var i = 0; i < valueArr.length; i++) {
+  oWorksheet.GetRange("A" + (i + 1)).SetValue(valueArr[i]);
+}
+
+var oFunction = Api.GetWorksheetFunction();
+var ans = oFunction.STDEV_P(3,2,3,4,5,6,7,8,9,10,11,12,0,1,13,14,3,5,17,18); 
+
+oWorksheet.GetRange("C1").SetValue(ans);
+
+builder.SaveFile("xlsx", "STDEV_P.xlsx");
+builder.CloseFile();