diff --git a/SC2000.md b/SC2000.md
index b596904..7eb9833 100644
--- a/SC2000.md
+++ b/SC2000.md
@@ -1,5 +1,10 @@
 # See if you can use ${#variable} instead
 
+`${#variable}` will be equal to the number of characters in `"${variable}"`
+
+This is the same result as `"$( echo "$variable" | wc -m )"`
+When "$variable" only contains single-byte characters, it's also the same as `"$( echo "$variable" | wc -c )"`
+
 ## example code
 
 ``` bash
@@ -8,4 +13,8 @@
 if [ "$( echo "$1" | wc -c )" -gt 1 ]; then
   echo "greater than 1"
 fi
-```
+
+if [ "$( echo "$1" | wc -m )" -gt 1 ]; then
+  echo "greater than 1"
+fi
+```
\ No newline at end of file