diff --git a/snippets/mask.md b/snippets/mask.md
index 44a74969e..09e8a096d 100644
--- a/snippets/mask.md
+++ b/snippets/mask.md
@@ -1,8 +1,11 @@
 ### mask
 
-Replaces all but the last `num` of characters (first if `num` is negative, by default `4`) with the provided mask character (`'*'` by default).
+Replaces all but the last `num` of characters with the specified mask character.
 
-Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regex to replace every character with the mask character. Concatenate the masked characters with the remaining unmasked portion of the string.
+Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regex to replace every character with the mask character. 
+Concatenate the masked characters with the remaining unmasked portion of the string.
+Omit the second argument, `num`, to keep a default of `4` characters unmasked.
+Omit the third argument, `mask`, to use a default character of `'*'` for the mask.
 
 ```js
 const mask = (cc,num = 4,mask = '*') =>