Using Constants

· 118 words · 1 minute read
#block #compile #const #constants #declaration #fmt #println #var #variables

Using constants can often be more efficient than using variables where possible because any references to the constant will be replaced at compile time, where as a variable would have memory allocated to it and can be changed. Using a defined constant is very similar to using a variable and can be declared as a block outside of a function (usually at the top of a file) - a little like your import.

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package main

import "fmt"

const (
    MESSAGE = "Hello Readers"
    URL     = "http://golangcode.com"
)

func main() {
    // Will output "Hello Readers of http://golangcode.com"
    fmt.Println(MESSAGE + " of " + URL)
}

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Author:  Edd Turtle

Edd is the Lead Developer at Hoowla, a prop-tech startup, where he spends much of his time working on production-ready Go and PHP code. He loves coding, but also enjoys cycling and camping in his spare time.

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