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How to define variables in Go Program ?
Go Programming Language Variables
Explains how to define varaible and assign its value here.
How to declare variable?
var variable_name data_type
Go Example to declare different data type variables
var name string var id int var salary float32
We can also declare multiple variable as below
var ( name string id int salary float32 }
How to assign variables ?
For already defined variables, equal sign (=) can be used to assign a value.
name = "name1" id = 10 salary = 25000
here string 'name1' is assigned to variable 'name'.
Is that possible to assign value to variable in declaration ?
yes, we can combine declaring a variable and assign value.
var name string = "name1" var id int = 10
Another option, to declare variable with defining data type and value using := syntax.
name := "name1" id := 10
Go Example for Variable Declaration and Assignment Demo
package main
import "fmt"
func main() {
// declare variables
var name string
var id int
var salary float32
// assign values
name = "name1"
id = 10
salary = 25000.500
fmt.Println("name: ", name)
fmt.Println("id: ", id)
fmt.Println("salary: ", salary)
}
Another option to declare variables
package main
import "fmt"
func main() {
// declare variables
var (
name string
id int
salary float32
)
// assign values
name = "name1"
id = 10
salary = 25000.500
fmt.Println("name: ", name)
fmt.Println("id: ", id)
fmt.Println("salary: ", salary)
}
Output:
$ go build variables-demo.go $ ./variables-demo name: name1 id: 10 salary: 25000.5
Go Example for variable declaration and assign value in single statement
package main
import "fmt"
func main() {
// declare and assign variables
var name string = "name1"
var id int = 10
var salary float32 = 25000.500
fmt.Println("name: ", name)
fmt.Println("id: ", id)
fmt.Println("salary: ", salary)
Another option to declare and assign variables
package main
import "fmt"
func main() {
// declare and assign variables
name := "name1"
id := 10
salary := 25000.500
fmt.Println("name: ", name)
fmt.Println("id: ", id)
fmt.Println("salary: ", salary)
}
Output:
$ go build variables-demo.go $ ./variables-demo name: name1 id: 10 salary: 25000.5« Previous Next »
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