Back to: Golang
A constant is a value that cannot be changed during program execution. Constants are useful for defining values that should not be modified, such as mathematical constants or configuration settings. Constants are declared using the const
keyword and must be assigned a value at the time of declaration.
Here’s an example of how to declare and use constants in Golang:
package main
import "fmt"
func main() {
// Declare a constant called "pi" with a value of 3.14159
const pi = 3.14159
// Declare a constant called "name" with a value of "John"
const name string = "John"
// Declare multiple constants at once
const (
x = 1
y = 2
z = 3
)
// Print the values of the constants
fmt.Println("Pi:", pi)
fmt.Println("Name:", name)
fmt.Println("x:", x, "y:", y, "z:", z)
}
In this example, we declare a constant called “pi” with a value of 3.14159 and a constant called “name” with a value of “John”. We also declare multiple constants at once using the const
keyword.
Finally, we print the values of the constants using the fmt.Println
function. When you run this program, you should see the following output:
Pi: 3.14159
Name: John
x: 1 y: 2 z: 3
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