diff --git a/sum.js b/sum.js
new file mode 100644
index 0000000..e8c5777
--- /dev/null
+++ b/sum.js
@@ -0,0 +1,14 @@
+// program to display the sum of natural numbers
+
+// take input from the user
+const number = parseInt(prompt('Enter a positive integer: '));
+
+let sum = 0;
+
+// looping from i = 1 to number
+// in each iteration, i is increased by 1
+for (let i = 1; i <= number; i++) {
+    sum += i;
+}
+
+console.log('The sum of natural numbers:', sum);