diff --git a/c-basic/scope.c b/c-basic/scope.c
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--- /dev/null
+++ b/c-basic/scope.c
@@ -0,0 +1,53 @@
+/**
+
+scope.c - scope and variables explained
+
+Copyright (C) 2023-2024 Mert Gör and contributors
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see .
+
+Feel free to send an email to mertgor@masscollabs.xyz for your questions
+
+ **/
+
+#include
+
+int main() {
+ int a;
+ {
+ int b;
+ b = 20;
+ a = 10;
+ printf("a : %d, b : %d\n", a, b); // correct way to get done the job/task
+ }
+ printf("a : %d\n", a); // correct way to get done the job/task for a variable
+ // printf("b : %d\n", b); // error !
+ /**
+ ~/Projects/hwpplayer1/c-course/c-basic $ gcc scope.c
+scope.c: In function ‘main’:
+scope.c:35:22: error: ‘b’ undeclared (first use in this function)
+ 35 | printf("b : %d\n", b); // error !
+ | ^
+scope.c:35:22: note: each undeclared identifier is reported only once for each function it appears in
+ **/
+
+ return 0;
+
+}
+
+/**
+ ~/Projects/hwpplayer1/c-course/c-basic $ ./a.out
+a : 10, b : 20
+a : 10
+ **/