Basic variable declaration

Go is a statically typed language. We know the type of a variable at compilation time.

// Basic variable declaration. Declares a variable of type specified on the right.
// The variable is initialized to the zero value of the respective type.
var x int
var s string
var p Person // Assuming type Person struct {}

// Assignment of a value to a variable
x = 3

// Short declaration using := infers the type
y := 4

u := int64(100)    // declare variable of type int64 and init with 100
var u2 int64 = 100 // declare variable of type int64 and init with 100

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