diff --git a/c/l11.c b/c/l11.c
new file mode 100644
index 0000000..72c8460
--- /dev/null
+++ b/c/l11.c
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int main() {
+    int x = 0;
+    char str[100];
+    printf("Enter word ");
+    scanf("%s", str);
+    int len = strlen(str);
+    for(int i = 0; i < len; i++) {
+        if(str[i] == 'a') {
+            x++;
+        }
+        else if(str[i] == 'e') {
+            x++;
+        }
+        else if(str[i] == 'i') {
+            x++;
+        }
+        else if(str[i] == 'o') {
+            x++;
+        }
+        else if(str[i] == 'u') {
+            x++;
+        }
+        else if(str[i] == 'y') {
+            x++;
+        }
+        else if(str[i] == 'A') {
+            x++;
+        }
+        else if(str[i] == 'E') {
+            x++;
+        }
+        else if(str[i] == 'I') {
+            x++;
+        }
+        else if(str[i] == 'O') {
+            x++;
+        }
+        else if(str[i] == 'U') {
+            x++;
+        }
+        else if(str[i] == 'Y') {
+            x++;
+        }
+    }
+    printf("Vowels: %d\n", x);
+    sleep(2);
+}
\ No newline at end of file