mvdan.cc
1// Copyright 2020 CUE Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package math_test
16
17import (
18 "fmt"
19 "testing"
20
21 "cuelang.org/go/pkg/internal/builtintest"
22 "cuelang.org/go/pkg/math"
23)
24
25func TestBuiltin(t *testing.T) {
26 builtintest.Run("math", t)
27}
28
29func Example_constants() {
30 show := func(name string, value any) {
31 fmt.Printf("% 7s: %v\n", name, value)
32 }
33
34 show("E", math.E)
35 show("Pi", math.Pi)
36 show("Phi", math.Phi)
37
38 show("Sqrt2", math.Sqrt2)
39 show("SqrtE", math.SqrtE)
40 show("SqrtPi", math.SqrtPi)
41 show("SqrtPhi", math.SqrtPhi)
42
43 show("Ln2", math.Ln2)
44 show("Log2E", math.Log2E)
45 show("Ln10", math.Ln10)
46 show("Log10E", math.Log10E)
47
48 // Output:
49 // E: 2.718281828459045
50 // Pi: 3.141592653589793
51 // Phi: 1.618033988749895
52 // Sqrt2: 1.4142135623730951
53 // SqrtE: 1.6487212707001282
54 // SqrtPi: 1.772453850905516
55 // SqrtPhi: 1.272019649514069
56 // Ln2: 0.6931471805599453
57 // Log2E: 1.4426950408889634
58 // Ln10: 2.302585092994046
59 // Log10E: 0.4342944819032518
60}