246 lines
3.7 KiB
Go
246 lines
3.7 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package math_test
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import (
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"fmt"
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"math"
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)
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func ExampleAcos() {
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fmt.Printf("%.2f", math.Acos(1))
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// Output: 0.00
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}
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func ExampleAcosh() {
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fmt.Printf("%.2f", math.Acosh(1))
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// Output: 0.00
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}
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func ExampleAsin() {
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fmt.Printf("%.2f", math.Asin(0))
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// Output: 0.00
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}
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func ExampleAsinh() {
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fmt.Printf("%.2f", math.Asinh(0))
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// Output: 0.00
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}
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func ExampleAtan() {
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fmt.Printf("%.2f", math.Atan(0))
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// Output: 0.00
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}
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func ExampleAtan2() {
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fmt.Printf("%.2f", math.Atan2(0, 0))
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// Output: 0.00
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}
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func ExampleAtanh() {
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fmt.Printf("%.2f", math.Atanh(0))
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// Output: 0.00
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}
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func ExampleCopysign() {
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fmt.Printf("%.2f", math.Copysign(3.2, -1))
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// Output: -3.20
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}
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func ExampleCos() {
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fmt.Printf("%.2f", math.Cos(math.Pi/2))
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// Output: 0.00
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}
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func ExampleCosh() {
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fmt.Printf("%.2f", math.Cosh(0))
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// Output: 1.00
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}
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func ExampleSin() {
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fmt.Printf("%.2f", math.Sin(math.Pi))
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// Output: 0.00
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}
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func ExampleSincos() {
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sin, cos := math.Sincos(0)
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fmt.Printf("%.2f, %.2f", sin, cos)
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// Output: 0.00, 1.00
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}
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func ExampleSinh() {
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fmt.Printf("%.2f", math.Sinh(0))
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// Output: 0.00
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}
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func ExampleTan() {
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fmt.Printf("%.2f", math.Tan(0))
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// Output: 0.00
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}
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func ExampleTanh() {
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fmt.Printf("%.2f", math.Tanh(0))
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// Output: 0.00
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}
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func ExampleSqrt() {
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const (
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a = 3
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b = 4
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)
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c := math.Sqrt(a*a + b*b)
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fmt.Printf("%.1f", c)
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// Output: 5.0
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}
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func ExampleCeil() {
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c := math.Ceil(1.49)
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fmt.Printf("%.1f", c)
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// Output: 2.0
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}
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func ExampleFloor() {
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c := math.Floor(1.51)
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fmt.Printf("%.1f", c)
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// Output: 1.0
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}
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func ExamplePow() {
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c := math.Pow(2, 3)
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fmt.Printf("%.1f", c)
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// Output: 8.0
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}
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func ExamplePow10() {
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c := math.Pow10(2)
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fmt.Printf("%.1f", c)
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// Output: 100.0
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}
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func ExampleRound() {
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p := math.Round(10.5)
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fmt.Printf("%.1f\n", p)
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n := math.Round(-10.5)
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fmt.Printf("%.1f\n", n)
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// Output:
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// 11.0
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// -11.0
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}
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func ExampleRoundToEven() {
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u := math.RoundToEven(11.5)
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fmt.Printf("%.1f\n", u)
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d := math.RoundToEven(12.5)
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fmt.Printf("%.1f\n", d)
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// Output:
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// 12.0
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// 12.0
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}
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func ExampleLog() {
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x := math.Log(1)
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fmt.Printf("%.1f\n", x)
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y := math.Log(2.7183)
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fmt.Printf("%.1f\n", y)
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// Output:
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// 0.0
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// 1.0
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}
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func ExampleLog2() {
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fmt.Printf("%.1f", math.Log2(256))
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// Output: 8.0
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}
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func ExampleLog10() {
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fmt.Printf("%.1f", math.Log10(100))
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// Output: 2.0
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}
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func ExampleRemainder() {
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fmt.Printf("%.1f", math.Remainder(100, 30))
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// Output: 10.0
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}
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func ExampleMod() {
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c := math.Mod(7, 4)
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fmt.Printf("%.1f", c)
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// Output: 3.0
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}
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func ExampleAbs() {
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x := math.Abs(-2)
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fmt.Printf("%.1f\n", x)
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y := math.Abs(2)
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fmt.Printf("%.1f\n", y)
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// Output:
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// 2.0
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// 2.0
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}
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func ExampleDim() {
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fmt.Printf("%.2f\n", math.Dim(4, -2))
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fmt.Printf("%.2f\n", math.Dim(-4, 2))
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// Output:
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// 6.00
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// 0.00
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}
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func ExampleExp() {
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fmt.Printf("%.2f\n", math.Exp(1))
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fmt.Printf("%.2f\n", math.Exp(2))
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fmt.Printf("%.2f\n", math.Exp(-1))
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// Output:
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// 2.72
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// 7.39
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// 0.37
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}
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func ExampleExp2() {
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fmt.Printf("%.2f\n", math.Exp2(1))
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fmt.Printf("%.2f\n", math.Exp2(-3))
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// Output:
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// 2.00
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// 0.12
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}
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func ExampleExpm1() {
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fmt.Printf("%.6f\n", math.Expm1(0.01))
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fmt.Printf("%.6f\n", math.Expm1(-1))
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// Output:
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// 0.010050
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// -0.632121
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}
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func ExampleTrunc() {
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fmt.Printf("%.2f\n", math.Trunc(math.Pi))
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fmt.Printf("%.2f\n", math.Trunc(-1.2345))
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// Output:
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// 3.00
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// -1.00
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}
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func ExampleCbrt() {
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fmt.Printf("%.2f\n", math.Cbrt(8))
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fmt.Printf("%.2f\n", math.Cbrt(27))
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// Output:
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// 2.00
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// 3.00
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}
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func ExampleModf() {
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int, frac := math.Modf(3.14)
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fmt.Printf("%.2f, %.2f\n", int, frac)
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int, frac = math.Modf(-2.71)
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fmt.Printf("%.2f, %.2f\n", int, frac)
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// Output:
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// 3.00, 0.14
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// -2.00, -0.71
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}
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