1 files changed, 1 insertions, 1 deletions
diff --git a/ch2/2-10.c b/ch2/2-10.c
index 3c6b0cc..e630718 100644
--- a/ch2/2-10.c
+++ b/ch2/2-10.c
@@ -16,7 +16,7 @@ int main() {
 void lower_str(char source[], char dest[]) {
     int i;
 
-    for (i = 0; source[i] != '\0'; i++)
+    for (i = 0; source[i]; i++)
         dest[i] = lower_char(source[i]);
 
     dest[i] = '\0';