How do Golang functions return named results?

Go functions can return results by naming the result, that is, specifying a name for the returned result. Syntax: func functionName() (result1 type1, result2 type2, ...) { ... }. For example, the calculateArea function returns the length and width of a rectangle: func calculateArea(length float64, width float64) (lengthVal float64, widthVal float64) { ... }. The benefits of naming results include improved readability, simplified testing, and enhanced error handling.

#How do Go functions return named results?

In Go language, we can return named results for functions by using named return values, which makes the code more readable and maintainable.

Grammar:

func functionName() (result1 type1, result2 type2, ...) {
    // 函数体
}

Practical case:

We define a function to find the area of ​​a rectanglecalculateArea, and return the length and width using named results:

package main

import "fmt"

// 求矩形面积并返回长和宽
func calculateArea(length float64, width float64) (lengthVal float64, widthVal float64) {
    lengthVal = length
    widthVal = width
    return
}

func main() {
    // 调用函数并接收命名结果
    length, width := calculateArea(5.0, 3.0)
    fmt.Println("矩形的长：", length)
    fmt.Println("矩形的宽：", width)
}

Output:

矩形的长： 5
矩形的宽： 3

Advantages:

• Improve code readability and maintainability
• Avoid using temporary variables or complex type conversions
• Simplify test cases
• Enhance error handling capabilities

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