34 lines
1.5 KiB
Markdown
34 lines
1.5 KiB
Markdown
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---
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title: Go Variables
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---
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# Variable declarations in Go
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## Method 1: Regular Variable Declarations
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A regular variable declaration creates one or more variables by binding identifiers with a type and an initial value. If a variable is declared without a type, then that variable is given the type of the corresponding initialization value in the assignment. If a variable is defined with no initial value, then the variable is initialized to its [zero value](https://golang.org/ref/spec#The_zero_value).
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The following examples are all valid variable declarations in go:
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``` go
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var x int = 1
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var y int
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var z = 0
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var a, b float32 = -1, -2
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```
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## Method 2: Short Variable Declarations
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Shorthand variable declarations create variables with only an identifier and an initial value. The `var` keyword and types are not needed to declare a variable using shorthand syntax:
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``` go
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x := 1
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text, err := ioutil.ReadAll(reader)
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```
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Short variable declarations may appear only inside functions. In some contexts such as the initializers for `if`, `for`, or `switch` statements, they can be used to declare local temporary variables.
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#### More Information:
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<!-- Please add any articles you think might be helpful to read before writing the article -->
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* [A Tour of Go](https://tour.golang.org/basics/8)
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* [Go By Example](https://gobyexample.com/variables)
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* [Golang Book](https://www.golang-book.com/books/intro/4)
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* [The Go Programming Language Specification](https://golang.org/ref/spec#Variable_declarations)
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