The grammatical structure of functions in golang

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The function contains: func Testfunc (parameter-list) return-list {

Function body

}

What is defined after the keyword func convention is the function, which has input parameters, and return parameters, as well as the function body that implements a specific function; where the input parameters and return parameters can be all or partially empty. Input parameters are generally called formal parameters, but they actually pass a copy of the caller's parameters, except for pointers, because the copied pointers also point to the same address.

Because the variables inside the function are local variables, it doesn't matter what variables are returned to the function caller, and doesn't care.

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