diff --git a/README.md b/README.md
index 11722cb..33c9119 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ ToDo List:
 - [ ] add support for priority operators
 - [X] add input_number() std function
 - [ ] add type() std function
-- [ ] add ceil() and floor() std functions
+- [X] add ceil() and floor() std functions
 - [X] base of the CLI
 - [ ] evaluate expression from stdin
 - [X] read a file
@@ -48,6 +48,7 @@ ToDo List:
 - [ ] add fully features strings support
 - [ ] add [classic problem solving](https://rosettacode.org) with code examples
 - [ ] add Web Assembly support and publish a demo website
+- [ ] refactor: remove inconsistency on how functions returns error codes
 
 ## Installation
 
diff --git a/sandbox.c b/sandbox.c
index e755b64..f6b7ce1 100644
--- a/sandbox.c
+++ b/sandbox.c
@@ -10,9 +10,13 @@
 #include <stdlib.h>
 
 int main () {
-    struct VariableStore* store = var_store_init();
-    printf("%d", var_store_hash_name(store, "var"));
+    float ex = 2.00001430511;
+    printf("as bin %d \n", (int) ex);
+
     return 0;
+    // struct VariableStore* store = var_store_init();
+    // printf("%d", var_store_hash_name(store, "var"));
+    // return 0;
     // struct List l1;
 
     // short val = 17;
diff --git a/src/funcs.c b/src/funcs.c
index 8249449..af89baf 100644
--- a/src/funcs.c
+++ b/src/funcs.c
@@ -28,6 +28,33 @@ int abs_impl(int* res, unsigned char* resType, unsigned char* types, int* args)
     return 1;
 }
 
+int floor_impl(int* res, unsigned char* resType, unsigned char* types, int* args)
+{
+    *resType = TYPE_INT;
+    if (types[0] == TYPE_INT) {
+        *res = args[0];
+        return 0;
+    }
+    if (types[0] == TYPE_FLOAT) {
+        float val = get_float_from_int_rep(args[0]);
+        
+        *res = (int) val;
+        return 0;
+    }
+    return 1;
+}
+
+int ceil_impl(int* res, unsigned char* resType, unsigned char* types, int* args)
+{
+    int resInterm = 0;
+    if (floor_impl(&resInterm, resType, types, args)) {
+        return 1;
+    }
+    resInterm += 1;
+    *res = resInterm;
+    return 0;
+}
+
 int print_number_impl(int* res, unsigned char* resType, unsigned char* types, int* args)
 {
     *resType = TYPE_INT;
@@ -277,6 +304,8 @@ struct FuncIntro intros[] = {
     {"random_int", &random_int_impl, 2},
 
     {"max", &max_impl, 2},
+    {"floor", &floor_impl, 1},
+    {"ceil", &ceil_impl, 1},
     {"get_pi", &get_pi_impl, 0},
 
     {"print_number", &print_number_impl, 1},
diff --git a/tests/test_evaluation.c b/tests/test_evaluation.c
index 3391706..b9ab7e6 100644
--- a/tests/test_evaluation.c
+++ b/tests/test_evaluation.c
@@ -69,9 +69,17 @@ void test_evaluation()
     assert(resType == TYPE_FLOAT);
     assert(float_almost_equal(1, get_float_from_int_rep(resVal)));
 
-    evaluate(state, "get_pi()", &resVal, &resType);
-    assert(resType == TYPE_FLOAT);
-    assert(float_almost_equal(3.14159, get_float_from_int_rep(resVal)));
+    evaluate(state, "ceil(1.5)", &resVal, &resType);
+    assert(resType == TYPE_INT);
+    assert(2 == resVal);
+
+    evaluate(state, "floor(1.5)", &resVal, &resType);
+    assert(resType == TYPE_INT);
+    assert(1 == resVal);
+
+    evaluate(state, "floor(1.001)", &resVal, &resType);
+    assert(resType == TYPE_INT);
+    assert(1 == resVal);
     
     evaluate(state, "random_int(1, 100)", &resVal, &resType);
     assert(resType == TYPE_INT);