How to get the return value of golang function?

Go language functions pass data through return values. To return a single value, simply specify the return value type in the function signature and use a variable to receive the return value when the function is called. To return multiple values, you need to use a tuple type in the function signature and use multiple variables to receive the return values ​​when calling the function.

#How do Go language functions get return values?

In the Go language, functions can pass data through return values. A function can return a single value, or multiple values, and the type of the return value must be specified in the function signature.

Return a single value

To return a single value, simply specify the return value type in the function signature as follows:

func myFunction() int {
    return 10
}

When calling the function, you can use variables Receive return value:

num := myFunction()
fmt.Println(num) // 输出：10

Return multiple values

To return multiple values, you need to use a tuple type in the function signature, as shown below:

func myFunction() (int, string) {
    return 10, "Hello"
}

In calling function, you can use multiple variables to receive return values:

num, str := myFunction()
fmt.Println(num, str) // 输出：10 Hello

Practical case: Calculate area

The following is an example of a function that calculates the area of ​​a rectangle:

func calculateArea(length, width float64) float64 {
    return length * width
}

In the main function , we can use this function and print the return value:

func main() {
    length := 5.0
    width := 2.5
    area := calculateArea(length, width)
    fmt.Println("矩形的面积为：", area) // 输出：矩形的面积为： 12.5
}

The above is the detailed content of How to get the return value of golang function?. For more information, please follow other related articles on the PHP Chinese website!