diff --git a/SLS_C/src/builtin.c b/SLS_C/src/builtin.c
index eee6133..15fc7d5 100644
--- a/SLS_C/src/builtin.c
+++ b/SLS_C/src/builtin.c
@@ -886,33 +886,105 @@ Boolean builtin_exponential(InterpreterState *interpreter_state) {
 }
 
 Boolean builtin_greater_than(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPES;
+    (void)ai;
+    (void)bi;
+    (void)type;
+
+    StackItem *node = interpreter_state->stack;
+    interpreter_state->stack = interpreter_state->stack->next->next;
+    node->next->next = NULL;
+    clean_stack(node);
+
+    return push_token(interpreter_state, (Token){
+        .type = TOKEN_BOOLEAN,
+        .boolean_literal = bf > af,
+    });
 }
 
 Boolean builtin_greater_than_or_equal_to(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPES;
+    (void)ai;
+    (void)bi;
+    (void)type;
+
+    StackItem *node = interpreter_state->stack;
+    interpreter_state->stack = interpreter_state->stack->next->next;
+    node->next->next = NULL;
+    clean_stack(node);
+
+    return push_token(interpreter_state, (Token){
+        .type = TOKEN_BOOLEAN,
+        .boolean_literal = bf >= af,
+    });
 }
 
 Boolean builtin_less_than(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPES;
+    (void)ai;
+    (void)bi;
+    (void)type;
+
+    StackItem *node = interpreter_state->stack;
+    interpreter_state->stack = interpreter_state->stack->next->next;
+    node->next->next = NULL;
+    clean_stack(node);
+
+    return push_token(interpreter_state, (Token){
+        .type = TOKEN_BOOLEAN,
+        .boolean_literal = bf < af,
+    });
 }
 
 Boolean builtin_less_than_or_equal_to(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPES;
+    (void)ai;
+    (void)bi;
+    (void)type;
+
+    StackItem *node = interpreter_state->stack;
+    interpreter_state->stack = interpreter_state->stack->next->next;
+    node->next->next = NULL;
+    clean_stack(node);
+
+    return push_token(interpreter_state, (Token){
+        .type = TOKEN_BOOLEAN,
+        .boolean_literal = bf <= af,
+    });
 }
 
 Boolean builtin_equal_to(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPES;
+    (void)ai;
+    (void)bi;
+    (void)type;
+
+    StackItem *node = interpreter_state->stack;
+    interpreter_state->stack = interpreter_state->stack->next->next;
+    node->next->next = NULL;
+    clean_stack(node);
+
+    return push_token(interpreter_state, (Token){
+        .type = TOKEN_BOOLEAN,
+        .boolean_literal = bf == af,
+    });
 }
 
 Boolean builtin_not_equal_to(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPES;
+    (void)ai;
+    (void)bi;
+    (void)type;
+
+    StackItem *node = interpreter_state->stack;
+    interpreter_state->stack = interpreter_state->stack->next->next;
+    node->next->next = NULL;
+    clean_stack(node);
+
+    return push_token(interpreter_state, (Token){
+        .type = TOKEN_BOOLEAN,
+        .boolean_literal = bf != af,
+    });
 }
 
 Boolean builtin_abs(InterpreterState *interpreter_state) {