Learn variable definition and assignment in Golang

The definition and assignment of variables in Golang require specific code examples

In Golang, the definition and assignment of variables are very simple and intuitive. This article will introduce the definition and assignment of variables in Golang through specific code examples.

First, let’s take a look at the definition of variables in Golang. In Golang, the definition of variables can be done using the var keyword. The specific syntax is as follows:

var variable name type

Among them, var represents the definition keyword of the variable, the variable name is your own defined variable name, and the type is the data type of the variable. . The following is a simple example:

var age int

The above code defines an integer variable named age. It should be noted that the definition of variables in Golang must declare the type of the variable. Golang is a strongly typed language.

Next, let’s take a look at variable assignment in Golang. Assignment to variables can be done using the = symbol. The specific syntax is as follows:

Variable name = expression

where the variable name is the name of the variable that needs to be assigned a value, and the expression is an expression that calculates a certain value. Here is a simple example:

age = 28

The above code assigns the calculated value 28 to the previously defined age variable.

In addition to assigning values ​​directly to already defined variables, we can also assign values ​​while defining variables. The specific syntax is as follows:

var variable name type = expression

The following is a simple example:

var name string = "Tom"

The above code defines a string variable named name and assigns the string "Tom" to the name variable.

In addition, Golang also supports concise assignment writing. The specific syntax is as follows:

Variable name := Expression

Among them, := is a symbol for concise assignment. The following is a simple example:

name := "Tom"

The above code defines a string variable named name and assigns the string "Tom" to the name variable .

It should be noted that the concise assignment symbol can only be used inside the function. If used outside the function, it will cause a compilation error.

To sum up, the definition and assignment of variables in Golang are very simple and intuitive. Just use the var keyword to define a variable, and then use the = symbol to assign a value to the variable. Concise assignment symbols can be used inside functions, which is convenient and fast. I hope the code examples in this article can help you better understand the definition and assignment of variables in Golang.

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