float encoder

2 files changed, 28 insertions, 0 deletions

diff --git a/src/gleam/json.gleam b/src/gleam/json.gleam
index c649ac3..8c3652c 100644
--- a/src/gleam/json.gleam
+++ b/src/gleam/json.gleam
@@ -98,6 +98,18 @@ pub external fn bool(input: Bool) -> Json =
 pub external fn int(input: Int) -> Json =
   "thoas_encode" "integer"
 
+/// Encode an float into JSON.
+///
+/// ## Examples
+///
+/// ```gleam
+/// > to_string(float(4.7))
+/// "4.7"
+/// ```
+///
+pub external fn float(input: Float) -> Json =
+  "thoas_encode" "float"
+
 /// The JSON value null.
 ///
 /// ## Examples
diff --git a/test/gleam_json_test.gleam b/test/gleam_json_test.gleam
index 79f17f9..7e93ab7 100644
--- a/test/gleam_json_test.gleam
+++ b/test/gleam_json_test.gleam
@@ -36,6 +36,22 @@ pub fn encode_null_test() {
   |> should_encode("null")
 }
 
+pub fn encode_int_test() {
+  json.int(-50)
+  |> should_encode("-50")
+
+  json.int(100)
+  |> should_encode("100")
+}
+
+pub fn encode_float_test() {
+  json.float(-50.5)
+  |> should_encode("-50.5")
+
+  json.float(100.0)
+  |> should_encode("100.0")
+}
+
 pub fn encode_object_test() {
   json.object([#("foo", json.int(5))])
   |> should_encode("{\"foo\":5}")