diff --git a/src/ytdl_sub/script/functions/numeric_functions.py b/src/ytdl_sub/script/functions/numeric_functions.py
index ba86bde2..beee8c25 100644
--- a/src/ytdl_sub/script/functions/numeric_functions.py
+++ b/src/ytdl_sub/script/functions/numeric_functions.py
@@ -1,6 +1,7 @@
 from ytdl_sub.script.types.resolvable import Float
 from ytdl_sub.script.types.resolvable import Integer
 from ytdl_sub.script.types.resolvable import Numeric
+from ytdl_sub.script.types.resolvable import Resolvable
 
 
 def _to_numeric(value: int | float) -> Numeric:
@@ -10,6 +11,14 @@ def _to_numeric(value: int | float) -> Numeric:
 
 
 class NumericFunctions:
+    @staticmethod
+    def float(value: Resolvable) -> Float:
+        return Float(value=float(value.value))
+
+    @staticmethod
+    def int(value: Resolvable) -> Integer:
+        return Integer(value=int(value.value))
+
     @staticmethod
     def add(left: Numeric, right: Numeric) -> Numeric:
         return _to_numeric(left.value + right.value)
diff --git a/src/ytdl_sub/script/functions/string_functions.py b/src/ytdl_sub/script/functions/string_functions.py
index 6773bcb4..5d0f68ef 100644
--- a/src/ytdl_sub/script/functions/string_functions.py
+++ b/src/ytdl_sub/script/functions/string_functions.py
@@ -1,10 +1,15 @@
 from typing import Optional
 
 from ytdl_sub.script.types.resolvable import Integer
+from ytdl_sub.script.types.resolvable import Resolvable
 from ytdl_sub.script.types.resolvable import String
 
 
 class StringFunctions:
+    @staticmethod
+    def string(value: Resolvable) -> String:
+        return String(value=str(value.value))
+
     @staticmethod
     def lower(string: String) -> String:
         """
diff --git a/src/ytdl_sub/script/types/function.py b/src/ytdl_sub/script/types/function.py
index 47aaa7ae..61522a81 100644
--- a/src/ytdl_sub/script/types/function.py
+++ b/src/ytdl_sub/script/types/function.py
@@ -76,13 +76,26 @@ class FunctionInputSpec:
         if is_union(expected_arg_type):
             # See if the arg is a valid against the union
             valid_type = False
-            for union_type in expected_arg_type.__args__:
-                if issubclass(input_arg_type, union_type):
-                    valid_type = True
-                    break
+
+            # if the input arg is a union, do a direct comparison
+            if is_union(input_arg_type):
+                valid_type = input_arg_type == expected_arg_type
+            # otherwise, iterate the union to see if it's compatible
+            else:
+                for union_type in expected_arg_type.__args__:
+                    if issubclass(input_arg_type, union_type):
+                        valid_type = True
+                        break
 
             if not valid_type:
                 return False
+        # If the input is a union and the expected type is not, see if
+        # each possible union input is compatible with the expected type
+        elif is_union(input_arg_type):
+            for union_type in input_arg_type.__args__:
+                if not issubclass(union_type, expected_arg_type):
+                    return False
+
         elif not issubclass(input_arg_type, expected_arg_type):
             return False
 
diff --git a/tests/unit/script/test_parser.py b/tests/unit/script/test_parser.py
index f57c9795..5d9bd7da 100644
--- a/tests/unit/script/test_parser.py
+++ b/tests/unit/script/test_parser.py
@@ -41,7 +41,7 @@ class TestParser:
         )
         assert parsed.ast[1].output_type == Union[String, Float]
 
-    def test_conditional_as_input(self):
+    def test_conditional_as_input_same_outputs(self):
         parsed = parse("hello {%concat(%if(True, 'hi', 'mom'), 'and dad')}")
         assert parsed == SyntaxTree(
             [
@@ -58,6 +58,20 @@ class TestParser:
             ]
         )
 
+    def test_conditional_as_input_different_outputs(self):
+        parsed = parse("hello {%string(%if(True, 'hi', 4))}")
+        assert parsed == SyntaxTree(
+            [
+                String("hello "),
+                Function(
+                    name="string",
+                    args=[
+                        IfFunction(name="if", args=[Boolean(True), String("hi"), Integer(4)]),
+                    ],
+                ),
+            ]
+        )
+
     def test_single_function_one_vararg(self):
         parsed = parse("hello {%concat('hi mom')}")
         assert parsed == SyntaxTree(