How does a Golang function return multiple values?

Functions in Go can return multiple values ​​through multiple variables separated by commas. The syntax is: func functionName(parameters) (returnValue1, returnValue2, ..., returnValueN type) {}. Example: func squareAndCube(num int) (int, int) { return num * num, num * num * num } Returns the square and cube.

How a function returns multiple values ​​in Go

In Go, a function can return multiple values ​​by passing multiple variables separated by a comma delimiter. . This is different from returning a single value, which uses a separate variable.

Syntax

The syntax of a function that returns multiple values ​​is as follows:

func functionName(parameters) (returnValue1, returnValue2, ..., returnValueN type) {
    // 函数体
}

Among them, returnValue1, returnValue2, etc. are return variables name and type.

Example

Consider a function that calculates the square and cube of a number:

import "fmt"

// 计算数的平方和立方
func squareAndCube(num int) (int, int) {
    square := num * num
    cube := num * num * num
    return square, cube
}

func main() {
    number := 5
    square, cube := squareAndCube(number)
    fmt.Printf("平方: %d, 立方: %d", square, cube)
}

In the main function, the squareAndCube function is called, It returns two values ​​square and cube. These values ​​are then assigned to the square and cube variables. Finally, use the fmt.Printf function to print out the square and cube.

Output:

平方: 25, 立方: 125

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