How to declare and initialize a variable in Go?

In Go, you declare and initialize a variable using the var keyword followed by the variable name, its type, and an optional initialization value.

Here's an example of declaring and initializing a variable in Go:

var age int // Declaration of a variable of type int

age = 25 // Initialization

fmt.Println(age) // Output: 25

You can also declare and initialize a variable in a single line using the short variable declaration := like this:

age := 25 // Declaration and initialization in a single line

fmt.Println(age) // Output: 25

Note that the variable's type is automatically inferred from the value assigned to it when using the := short variable declaration.