From 87110d27ba51e114ed29c303af3145828a02f709 Mon Sep 17 00:00:00 2001
From: Colin McDonnell <colinmcd94@gmail.com>
Date: Sun, 15 Feb 2026 10:59:25 -0500
Subject: [PATCH] add modulo function with tests

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 index.js | 9 ++++++++-
 test.js  | 5 ++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index 0b32465..b14025e 100644
--- a/index.js
+++ b/index.js
@@ -6,4 +6,11 @@ function subtract(a, b) {
   return a - b;
 }
 
-module.exports = { add, subtract };
+function modulo(a, b) {
+  if (b === 0) {
+    throw new Error("Modulo by zero");
+  }
+  return a % b;
+}
+
+module.exports = { add, subtract, modulo };
diff --git a/test.js b/test.js
index cef9a03..50e6160 100644
--- a/test.js
+++ b/test.js
@@ -1,8 +1,11 @@
-const { add, subtract } = require("./index");
+const { add, subtract, modulo } = require("./index");
 
 const assert = require("assert");
 
 assert.strictEqual(add(1, 2), 3);
 assert.strictEqual(subtract(5, 3), 2);
+assert.strictEqual(modulo(10, 3), 1);
+assert.strictEqual(modulo(7, 2), 1);
+assert.throws(() => modulo(1, 0), /Modulo by zero/);
 
 console.log("All tests passed!");