diff --git a/lib/textMaskingAndSecurity.js b/lib/textMaskingAndSecurity.js
index 03fcd0a..ead4791 100644
--- a/lib/textMaskingAndSecurity.js
+++ b/lib/textMaskingAndSecurity.js
@@ -60,6 +60,17 @@ function maskCreditCard(cardNumber, visibleDigits = 4) {
     Expected Output: '************3456'
     Mask all but the digits provided in arguments by user for secure display. Code your solution and make sure to export it.
   */
+    let res='';
+    for(let i=0; i<cardNumber.length-visibleDigits; i++) {
+       res +='*';
+    }
+   for(let i=cardNumber.length-visibleDigits; i<cardNumber.length;i++){
+    res +=cardNumber[i];
+   }
+
+  return res;
+
 }
+
 // Grouped exports
 export { maskEmail, maskCreditCard, maskString, moderate };