How to traverse variable parameters in golang?

You can traverse variable parameters in Go through the range keyword, which uses a for-range loop to traverse each value of the variable parameters. Alternatively, other methods can be used, such as the len() and index() functions, unpacking variadic arguments, or using the built-in reflect package.

How to traverse variable parameters in Go

In the Go language, variable parameters are used... syntax means that it allows you to pass any number of parameters to the function. The method of traversing variable parameters is as follows:

Use range keyword

func printValues(values ...int) {
    for _, value := range values {
        fmt.Println(value)
    }
}

Practical case

Suppose we have a function that takes a variable number of integers and returns their sum. We can write this function by looping over the variadic arguments and using the operator.

func sumValues(values ...int) int {
    var sum int
    for _, value := range values {
        sum += value
    }
    return sum
}

func main() {
    result := sumValues(1, 2, 3, 4, 5)
    fmt.Println("结果：", result)
}

Output:

结果： 15

Other methods

In addition to the range keyword, Other methods can be used to iterate over variadic parameters:

• Using the len() and index() functions: The len() function returns the length of the variable argument, while the index() function returns the argument at the specified index.
• Unpacking variable parameters: You can unpack variable parameters into a slice and then traverse the slice.
• Use the built-in reflect package: reflect package provides ValueOf() and Len() Function that can be used to obtain the type and length of variable parameters.

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