Quickly get started with the basic syntax of Golang variable declaration and assignment

Quick start with the basic syntax of Golang variable declaration and assignment

Overview:

Golang is a statically typed, compiled programming language with Excellent performance and development efficiency. In Golang, variable declaration and assignment are one of the basic operations we often use when writing programs. This article will take you quickly into the basic syntax of Golang variable declaration and assignment, and provide specific code examples.

Variable declaration:

In Golang, we need to use the var keyword to declare a variable and specify the type of the variable. The basic syntax of variable declaration is as follows:

var variable name variable type

For example, declare an integer variable age:

var age int

In the above In the code, we use the var keyword to declare an integer variable named age.

At the same time, we can also use a short declaration to declare variables, which will automatically infer the variable type. The basic syntax is as follows:

Variable name:= value

For example, declare a string variable name through a short declaration:

name := "John"

In the above code, we declare a string variable named name using a short declaration and assign it the value "John".

Variable assignment:

In Golang, we can use the assignment operator "=" to assign a value to a declared variable. The basic syntax is as follows:

Variable name = value

For example, assign the age variable to 18:

age = 18

In the above code, we 18 is assigned to the declared age variable.

At the same time, we can also assign values ​​at the same time as variable declaration. The basic syntax is as follows:

Variable name:= value

For example, declare an integer variable count and assign a value of 10:

count := 10

In the above code, we also declare an integer variable named count and assign it a value of 10.

Multiple assignment of variables:

In Golang, we can also use multiple assignment to assign values ​​to multiple variables at the same time. The basic syntax is as follows:

Variable 1, variable 2, ... := value 1, value 2, ...

For example, assign values ​​to variable x and variable y at the same time:

x, y := 10, 20

In the above code, we declare two integer variables x and y at the same time, and assign them to 10 and 20 respectively.

Code example:

The following is a complete code example that demonstrates the basic syntax of variable declaration and assignment in Golang:

package main

import "fmt"

func main() {

// 声明变量
var age int
var name string
// 赋值
age = 18
name = "John"
// 简短声明并赋值
count := 10
// 多重赋值
x, y := 10, 20
// 打印变量的值
fmt.Println("age:", age)
fmt.Println("name:", name)
fmt.Println("count:", count)
fmt.Println("x:", x)
fmt.Println("y:", y)

}

In the above code, we first use the var keyword to declare an integer variable named age. and a string variable named name, and assign values ​​respectively; then use a short declaration to declare an integer variable count and assign a value; finally, use multiple assignment to assign values ​​to variables x and variables y at the same time. Finally, we print the value of the variable through the Println function of the fmt package.

Summary:

This article introduces the basic syntax of variable declaration and assignment in Golang, and provides specific code examples. Through these basic operations, you can easily declare and assign variables when writing Golang programs, laying the foundation for subsequent program development. I hope this article will help you quickly get started with Golang variable declaration and assignment.

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