diff --git a/example/ex-algo02.c b/example/ex-algo02.c
index 743f7841..221cfdc1 100644
--- a/example/ex-algo02.c
+++ b/example/ex-algo02.c
@@ -4,16 +4,16 @@
 
 /* Define a dynamic array of int */ 
 ARRAY_DEF(vector_int, int)
-/* Register the oplist of this dynamic array globally */
+/* Register the oplist of this dynamic array globally (using implicitely M_BASIC_OPLIST) */
 #define M_OPL_vector_int_t() ARRAY_OPLIST(vector_int)
-/* Define some standards algorithms on this dynamic array */
+/* Define some standards algorithms on this dynamic array. We can reuse the prefix of the dynamic array */
 ALGO_DEF(vector_int, vector_int_t)
 
 /* Define a dynamic array of bool */ 
 ARRAY_DEF(vector_bool, bool)
 /* Register the oplist of this dynamic array globally */
 #define M_OPL_vector_bool_t() ARRAY_OPLIST(vector_bool, M_BOOL_OPLIST)
-/* Define some standards algorithms on this dynamic array */
+/* Define some standards algorithms on this dynamic array. We can reuse the prefix of the dynamic array */
 ALGO_DEF(vector_bool, vector_bool_t)
 
 /* ID function */
@@ -41,10 +41,10 @@ int main(void)
 #else
     for M_EACH(it, myvector, vector_int_t) {
         printf(" %d", *it);
-      }
+    }
 #endif
     printf("\n");
-  }
+  } /* End of M_LET: myvector & tmp are automaticly cleared */
   
   // Same thing but with booleans
   M_LET(myvector, tmp, vector_bool_t) {
@@ -56,13 +56,13 @@ int main(void)
     printf("myvector contains:");
     for M_EACH(it, myvector, vector_bool_t) {
         printf(" %d", (int)*it);
-      }
+    }
     printf("\n");
     printf ("ALL: %d ANY: %d NONE: %d\n",
             vector_bool_all_of_p(myvector, id),
             vector_bool_any_of_p(myvector, id),
             vector_bool_none_of_p(myvector, id) );
-  }
+  } /* End of M_LET: myvector & tmp are automaticly cleared */
 
   return 0;
 }
diff --git a/example/ex-algo03.c b/example/ex-algo03.c
index 940b9837..292f3b27 100644
--- a/example/ex-algo03.c
+++ b/example/ex-algo03.c
@@ -14,7 +14,7 @@ ARRAY_DEF(vector_int, int)
 /* Register the oplist of this array of integer globally */
 #define M_OPL_vector_int_t() ARRAY_OPLIST(vector_int)
 
-/* Micro macro to detect if a string starts with the given pattern */
+/* Micro macro to detect if the key string starts with the given pattern */
 #define start_with(pattern, item)                \
   string_start_with_str_p((item).key, (pattern))
 
@@ -26,11 +26,10 @@ int main(void)
   int s = 0;
   // Init keys as a vector_int_t, initialize it (and prepare its destruction)
   M_LET(keys, vector_int_t)
-    // Initialize m as a dictionnary and initialize it with the given database
-    // Initialize tmp as a dictionanry
-    M_LET( (m, (STRING_CTE("foo"), 1), (STRING_CTE("bar"), 42), (STRING_CTE("bluez"), 7), (STRING_CTE("stop"), 789) ), tmp, dict_t) {
- 
-    /* Extract all elements of 'm' that starts with 'b' */
+  // Initialize m as a dictionnary and initialize it with the given database
+  // Initialize tmp as a dictionnary
+  M_LET( (m, (STRING_CTE("foo"), 1), (STRING_CTE("bar"), 42), (STRING_CTE("bluez"), 7), (STRING_CTE("stop"), 789) ), tmp, dict_t) {
+    /* Extract all elements of 'm' that starts with 'b' and fills tmp with it */
     ALGO_EXTRACT(tmp, dict_t, m, dict_t, start_with, "b");
     /* Extract the values of theses elements */
     ALGO_TRANSFORM(keys, vector_int_t, tmp, dict_t, get_value);
diff --git a/example/ex-algo04.c b/example/ex-algo04.c
index d1a07641..8f6c7a89 100644
--- a/example/ex-algo04.c
+++ b/example/ex-algo04.c
@@ -14,8 +14,8 @@ int main(void)
 {
   // Let 's' be a string_t and initialize it.
   M_LET(s, string_t)
-    // Let 'v' be a vector of integer and initialize it.
-    M_LET( (v, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10), vector_int_t) {
+  // Let 'v' be a vector of integer and initialize it.
+  M_LET( (v, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10), vector_int_t) {
     int sum = 0, product = 0;
     
     // Compute the sum of theses integers.