Go Variables

Variable declarations in Go

Method 1: Regular Variable Declarations

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.

The following examples are all valid variable declarations in go:

var x int = 1 var y int var z = 0 var a, b float32 = -1, -2

Method 2: Short Variable Declarations

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:

x := 1 text, err := ioutil.ReadAll(reader)

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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