Can golang variable parameters be used for function return values?

In the Go language, variable parameters cannot be used as function return values ​​because the return value of the function must be of a fixed type. Variadics are untyped and therefore cannot be used as return values.

Can Go language variable parameters be used as function return values?

In the Go language, variable parameters are used for function input. So, can variable parameters also be used as function return values?

Answer: No

In the Go language, the return value of a function must be of a fixed type, while the variable parameter type is undefined. Therefore, variadic arguments cannot be used as function return values.

Practical case:

The following code demonstrates an example of variable parameters in the Go language being used as function inputs and cannot be used as return values:

import "fmt"

// 可变参数作为函数输入
func sum(values ...int) int {
    s := 0
    for _, v := range values {
        s += v
    }
    return s
}

// 可变参数不能用作函数返回值
func errorMsgs() ([]string, error) {
    // ...此处为示例错误处理代码

    // 返回多个错误消息
    return nil, fmt.Errorf("发生错误")
}

func main() {
    total := sum(1, 2, 3, 4, 5)
    fmt.Println("Total:", total)

    _, err := errorMsgs()
    if err != nil {
        fmt.Println("错误信息:", err)
    }
}

In this example, the sum function demonstrates the use of variable parameters as function input, while the errorMsgs function demonstrates that variable parameters cannot be used as function return values.

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