Go create a project

1.0 enter the Project Creation folder CD $ gopath/src2.0 create the project mkdir localeasy3.0 create go file touch helloworld. go4.0 open and edit open helloworld. Go

Code in helloworld. Go

Package localeasy // (package-like classes in OC are encapsulated) func SQRT (x float64) float64 {/* FUNC: the keyword * SQRT (x float64) of the declarative Method) float64 * SQRT: method name in objectc * x float64: form parameter of the method-data structure similar to the variable declaration in OC, except that the variable name is followed by the Data Type * float64: type of return value in OC */Z: = 0.0 for I: = 0; I <1000; I ++ {z-= (z * z-x) /(2 * x)} return z}