How to implement variable parameters in golang function

Yes, the Go language supports using the ... operator to create variable parameter functions. Here are the steps: Use the ... operator to represent a variadic parameter, followed by the parameter type as its name. When calling a variadic function, you can pass any number of arguments. Arguments passed to variadic functions are unpacked into a slice. A variadic function must be the last parameter in the function parameter list. Variadic functions cannot have default parameters.

Use Go to implement a variable parameter function

In the Go language, a function can accept any number of parameters, which is called is a variable parameter function. This feature allows functions to handle a dynamic number of input parameters.

Syntax

Variadic functions are represented using the ... operator, followed by the parameter type as its name. For example:

func sum(nums ...int) int {
    // 计算 nums 中所有整数的和
}

Passing parameters

When calling a variable parameter function, you can use any number of parameters. For example:

result := sum(1, 2, 3, 4)

In this example, the sum function accepts four integer arguments and calculates their sum, which is stored in the result variable.

Practical case

The following is a practical case using a variable parameter function:

package main

import "fmt"

func main() {
    // 计算任意数量整数的最小值
    fmt.Println(min(1, 2, 3, 4, 5, -1))
}

func min(nums ...int) int {
    if len(nums) == 0 {
        return 0 // 返回一个默认值，例如 0
    }
    min := nums[0]
    for _, num := range nums {
        if num < min {
            min = num
        }
    }
    return min
}

Notes

• The variable parameter function must be the last parameter in the function parameter list.
• The parameters passed to the variadic function will be unpacked into a slice.
• Variadic functions cannot have default parameters.

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