dongya6381
2016-04-13 08:03 浏览 3
已采纳

如何在Golang中使用内置方法?

I am trying this simple code:

var f1 float64 = 23.435
fmt.Println(f1.Acos())

But it gives me the following error:

f1.Acos undefined (type float64 has no field or method Acos)

Can anybody help me in understanding the right way of using the built in methods ?

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1条回答 默认 最新

  • 已采纳
    dongzou7134 dongzou7134 2016-04-13 08:18

    Acos is a function of the math package, not a built-in method of float64, so you must import it first

    import (
        "fmt"
        "math"
    )
    

    Then, as per documentation, you pass f1 as an argument to the math.Acos

    fmt.Println(math.Acos(f1))
    
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