From e90b0ce68b12a75732f28b6672d4c48ca73eaffe Mon Sep 17 00:00:00 2001
From: kakulisen <lziqiang1@gmail.com>
Date: Thu, 30 Apr 2020 14:18:06 +0800
Subject: [PATCH] math: add function examples.

The function Modf lacks corresponding examples.

Change-Id: Id93423500e87d35b0b6870882be1698b304797ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/231097
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
---
 src/math/example_test.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/math/example_test.go b/src/math/example_test.go
index ce9c383256..9fc1967967 100644
--- a/src/math/example_test.go
+++ b/src/math/example_test.go
@@ -227,3 +227,14 @@ func ExampleCbrt() {
 	// 2.00
 	// 3.00
 }
+
+func ExampleModf() {
+	int, frac := math.Modf(3.14)
+	fmt.Printf("%.2f, %.2f\n", int, frac)
+
+	int, frac = math.Modf(-2.71)
+	fmt.Printf("%.2f, %.2f\n", int, frac)
+	// Output:
+	// 3.00, 0.14
+	// -2.00, -0.71
+}