Return value type and multiple return value characteristics of Go language functions

Title: Return value type and multiple return value characteristics of Go language functions

Go language is an open source programming language developed by Google and is widely used in Cloud computing, back-end development and other fields. In the Go language, the return value type and multiple return value features of functions are one of its features. Let us use specific code examples to gain an in-depth understanding of their usage and advantages.

Return value type

In the Go language, a function can define a return value type, which is used to specify the type of function return value. The return value type can be any basic data type, or a structure, pointer, etc. Here is a simple example showing a function that returns an integer:

package main

import "fmt"

func add(x, y int) int {
    return x + y
}

func main() {
    result := add(3, 5)
    fmt.Println("3 + 5 =", result)
}

In this example, the add function accepts two integer parameters and returns their sum, The return value type is int. Call the add function in the main function, assign the return value to the result variable, and finally print out the calculation result.

Multiple return value feature

In addition to being able to define a single return value type, the Go language also supports functions returning multiple values. This feature is very useful when dealing with complex logic, and can return multiple results at once, avoiding the use of global variables or reference passing. Here is an example that demonstrates a function that returns two values:

package main

import "fmt"

func divide(x, y int) (int, int) {
    quotient := x / y
    remainder := x % y
    return quotient, remainder
}

func main() {
    q, r := divide(10, 3)
    fmt.Println("10 ÷ 3 =", q, "余", r)
}

In this example, the divide function accepts two integer parameters and returns two results of type integer, are the quotient and remainder respectively. Call the divide function in the main function, and use multiple assignment to obtain two return values, and finally print out the calculation result.

Summary

Through the above code examples, we have learned about the return value type and multiple return value characteristics of Go language functions. The return value type can help us specify the type of function return value, making the code clearer and more robust; the multiple return value feature can easily obtain multiple calculation results at the same time, simplifying the code logic. In actual development, rational use of return value types and multiple return value features can improve the readability and efficiency of the code and bring a better development experience.

I hope this article will help you understand the return value type and multiple return value features of Go language functions!

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