diff --git a/src/keywords.js b/src/keywords.js
index 3c84e50..4e821a3 100644
--- a/src/keywords.js
+++ b/src/keywords.js
@@ -21,6 +21,13 @@ export syntax ghalat = function (ctx) {
     return #`false`;
 }
 
+
+// isNaN
+export syntax kya_galat = function (ctx) {
+    let params = ctx.next().value
+    return #`isNaN ${params}`;
+}
+
 // if
 export syntax agar = function (ctx) {
 	
@@ -152,4 +159,4 @@ export syntax karo = function(ctx) {
 	}
 	
 	
-}
\ No newline at end of file
+}