Add absolute_value function for floats

2 files changed, 30 insertions, 0 deletions

diff --git a/src/gleam/float.gleam b/src/gleam/float.gleam
index f810161..c85903f 100644
--- a/src/gleam/float.gleam
+++ b/src/gleam/float.gleam
@@ -115,3 +115,16 @@ pub external fn round(Float) -> Int =
 ///
 pub external fn truncate(Float) -> Int =
   "erlang" "trunc"
+
+/// Returns the absolute value of the input as a float.
+///
+/// ## Examples
+///
+///    > absolute_value(-12.5)
+///    12.5
+///
+///    > absolute_value(10.2)
+///    10.2
+///
+pub external fn absolute_value(Float) -> Float =
+  "erlang" "abs"
diff --git a/test/gleam/float_test.gleam b/test/gleam/float_test.gleam
index d8ed02e..5508a76 100644
--- a/test/gleam/float_test.gleam
+++ b/test/gleam/float_test.gleam
@@ -183,3 +183,20 @@ pub fn max_test() {
   float.max(-1.1, -1.)
   |> should.equal(-1.)
 }
+
+pub fn absolute_value_test() {
+  float.absolute_value(-1.0)
+  |> should.equal(1.0)
+
+  float.absolute_value(-20.6)
+  |> should.equal(20.6)
+
+  float.absolute_value(0.0)
+  |> should.equal(0.0)
+
+  float.absolute_value(1.0)
+  |> should.equal(1.0)
+
+  float.absolute_value(25.2)
+  |> should.equal(25.2)
+}