What are the similarities and differences between Go language and Golang?

Go and Golang are the same programming language, and there is no substantial difference between them. "Go" is the official name of the programming language and is widely used in official documentation and in the community. "Golang" is a commonly used keyword for the Go language in search engines, and sometimes people use this name when searching.

Go language is a statically typed, compiled, concurrent programming support, and garbage collection programming language developed by Google. It is designed as a fast compilation language and supports multiple programming paradigms such as object-oriented, functional, and procedural.

The following will show the basic features and usage of Go language through specific code examples.

First is a simple Hello World program:

package main

import "fmt"

func main() {
    fmt.Println("Hello, World!")
}

The above code demonstrates the simplest Go program, which imports the fmt package to call the Println function to print out "Hello, World! ".

The following is a simple function example to calculate the sum of two numbers:

package main

import "fmt"

func add(a, b int) int {
    return a + b
}

func main() {
    sum := add(3, 5)
    fmt.Println("The sum is:", sum)
}

In this example, an add function is defined to calculate the sum of two integers, and then in the main Call the function and print out the result.

In addition, the concurrent programming capability of Go language is also one of its important features. The following is a simple concurrency example that uses goroutine to execute two tasks concurrently:

package main

import (
    "fmt"
    "time"
)

func task1() {
    for i := 1; i <= 5; i++ {
        fmt.Println("Task 1 -", i)
        time.Sleep(time.Millisecond * 500)
    }
}

func task2() {
    for i := 1; i <= 5; i++ {
        fmt.Println("Task 2 -", i)
        time.Sleep(time.Millisecond * 500)
    }
}

func main() {
    go task1()
    go task2()

    time.Sleep(time.Second * 3)
}

In this example, the task1 and task2 functions output a series of numbers respectively, and the two tasks are executed concurrently through goroutine. Finally, the main function waits for 3 seconds before ending the program.

Through the above code examples, we have learned about some basic features and syntax of the Go language, including function definition, package import, concurrent programming, etc. It can be seen that the Go language's simplicity, efficiency, and natural support for concurrent programming make it increasingly popular in today's software development.

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