diff --git a/Übung 2/util.c b/Übung 2/util.c
index 1f96ab3..81bd537 100644
--- a/Übung 2/util.c	
+++ b/Übung 2/util.c	
@@ -15,13 +15,13 @@ bool is_num(char *str) {
         return false;
     }
     while (*str) {
-        if (!isdigit((unsigned char)*str) || !(*str == '.')) {
-            return true;
+        if (!isdigit((unsigned char)*str)) {
+            return false;
         }
         str++;
     }
 
-    return false;
+    return true;
 }
 
 bool is_int(char *str) {
@@ -33,7 +33,7 @@ bool is_int(char *str) {
     }
     while (*str) {
         if (!isdigit((unsigned char)*str)) {
-            return true;
+            return false;
         }
         str++;
     }