diff --git a/fibonacci-number/sol.go b/fibonacci-number/sol.go
new file mode 100644
index 0000000..59765fc
--- /dev/null
+++ b/fibonacci-number/sol.go
@@ -0,0 +1,9 @@
+package main
+
+func fib(n int) int {
+	current, next := 0, 1
+	for i := 0; i < n; i++ {
+		current, next = next, current+next
+	}
+	return current
+}