Solve golang error: duplicate argument 'x' in function declaration, solution

Solution to golang error: duplicate argument 'x' in function declaration, solution

When developing using the Golang programming language, sometimes we encounter some common error. One of them is "duplicate argument 'x' in function declaration", that is, duplicate arguments appear in the function declaration. This error usually occurs because there are two or more duplicate parameter names in the function's parameter list.

When we define a function, each parameter should have a different name to distinguish different parameters. If two or more parameters have the same name, it will cause the compiler to think that we have duplicate parameters when declaring the function.

Here is an example that shows how to resolve this error and avoid duplicate parameters when declaring functions.

package main

import "fmt"

func add(x int, y int) int { // 声明函数时出现了重复的参数 'y'
    return x + y
}

func main() {
    result := add(10, 5)
    fmt.Println(result)
}

In the above example, we defined a function add to calculate the sum of two integers. However, in the function declaration, we mistakenly named both parameters y, causing the compiler to report a "duplicate argument 'y' in function declaration" error.

To solve this problem, we only need to change the parameter names of the function to be unique. The following is the modified sample code:

package main

import "fmt"

func add(x int, z int) int { // 修改了参数名称 'y' 为 'z'
    return x + z
}

func main() {
    result := add(10, 5)
    fmt.Println(result)
}

We only need to change the parameter y to a non-duplicate parameter name z to solve this problem. This way, the compiler will correctly identify the arguments in the function declaration and will not report "duplicate argument 'x' in function declaration" errors.

To summarize, the way to solve the "duplicate argument 'x' in function declaration" error is to ensure that each parameter has a different name in the function declaration. By avoiding duplication of parameter names, we can avoid such errors and ensure that our programs compile and run properly.

I hope this article will help you solve the duplicate parameter declaration error in Golang. Happy programming!

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