diff --git a/base_2.md b/base_2.md
index 3284df004d4bfc89f8ac26a129d9012910b855b4..788e4ed65569fe3bd39a14981f977777a8725dcd 100644
--- a/base_2.md
+++ b/base_2.md
@@ -265,6 +265,11 @@ while (j < 10) {
     x[j] = 1;
     j += 1;
 }
+int j = 0;
+do {
+    x[j] = -1;
+    j += 1;
+} while (j < 9)
 ```