From 1aa782ae22aa55d44ba4ed01ad447915dc7802cb Mon Sep 17 00:00:00 2001
From: Louis Pilfold <louis@lpil.uk>
Date: Tue, 23 Jan 2024 14:41:22 +0000
Subject: Add equality lesson

---
 .../chapter0_basics/lesson16_constants/code.gleam      | 13 +++++++++++++
 .../chapter0_basics/lesson16_constants/text.html       | 18 ++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 src/content/chapter0_basics/lesson16_constants/code.gleam
 create mode 100644 src/content/chapter0_basics/lesson16_constants/text.html

(limited to 'src/content/chapter0_basics/lesson16_constants')

diff --git a/src/content/chapter0_basics/lesson16_constants/code.gleam b/src/content/chapter0_basics/lesson16_constants/code.gleam
new file mode 100644
index 0000000..aed6fb0
--- /dev/null
+++ b/src/content/chapter0_basics/lesson16_constants/code.gleam
@@ -0,0 +1,13 @@
+import gleam/io
+
+const ints: List(Int) = [1, 2, 3]
+
+const floats = [1.0, 2.0, 3.0]
+
+pub fn main() {
+  io.debug(ints)
+  io.debug(ints == [1, 2, 3])
+
+  io.debug(floats)
+  io.debug(floats == [1.0, 2.0, 3.0])
+}
diff --git a/src/content/chapter0_basics/lesson16_constants/text.html b/src/content/chapter0_basics/lesson16_constants/text.html
new file mode 100644
index 0000000..f610dcd
--- /dev/null
+++ b/src/content/chapter0_basics/lesson16_constants/text.html
@@ -0,0 +1,18 @@
+<p>
+  As well as let assignments Gleam also has constants, which are defined at the
+  top level of a module.
+</p>
+<p>
+  Constants must be literal values, functions cannot be used in their
+  definitions.
+</p>
+<p>
+  Constants may be useful for values that are used throughout your program,
+  permitting them to be named and to ensure there are no differences in the
+  definition between each use.
+</p>
+<p>
+  Using a constant may be more efficient than creating the same value in
+  multiple functions, though the exact performance characteristics will depend
+  on the runtime and whether compiling to Erlang or JavaScript.
+</p>
-- 
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