To declare and initialize variables in Golang or Go, there are 2 ways to do it:
- Declare and initialize the variables at the same time using the
:=operator - The short way - Declare variable first and initialize it later - The long way
Declare and initialize the variables at the same time using the := operator - The short way
To declare and initialize the variable at the same, we can write the name of the variable followed by the := operator and then the value for the variable.
Golang compiler will automatically infer or analyze the type using the value assigned.
It can be done like this,
package main
// Method:
// Declare and initialize the variables at the
// same time using the `:=` operator - The short way
import "fmt"
func main() {
// declare and initialize the
// varaible using the `:=` operator
name := "John Doe"
// log to the console
fmt.Print(name)
}
See the above code live in The Go Playground.
We have successfully declared and initialized the variable at the same time. Yay 🥳!
Declare variable first and initialize it later
To declare the variable first we can use the var keyword followed by the name of the variable and then its type. And to initialize the variable with a value you can use the variable name followed by the = operator (assignment operator symbol) and then the value you need to assign to the variable.
TL;DR
package main
// Method:
// Declare variable first and initialize it later - The long way
import "fmt"
func main() {
// declare variable and its type
// using the `var` keyowrd
var name string
// assign a string value to
// it using the `=` operator
name = "John Doe"
// log to the console
fmt.Print(name)
}
For example, let's say we need to make a variable called name with the type of string.
It can be done like this,
package main
func main() {
// declare variable and its type
// using the `var` keyowrd
var name string
}
Now to initialize it with a value let's use the = operator (assignment operator) and then type the value it needs to hold.
It can be done like this,
package main
// Method:
// Declare variable first and initialize it later - The long way
import "fmt"
func main() {
// declare variable and its type
// using the `var` keyowrd
var name string
// assign a string value to
// it using the `=` operator
name = "John Doe"
// log to the console
fmt.Print(name)
}
See the above code live in The Go Playground.
We have successfully declared and then initialized the variable in Golang 😃.
That's all 😃!