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Cover image for Variabel on Golang
M Fariz Wisnu prananda
M Fariz Wisnu prananda

Posted on

Variabel on Golang

so now i will tell about variable in golang.

in golang, when the variable declaration must be followed by its data type. this concept is manifest typing . an example like this

package main

import "fmt"

func main(){
   var firstName string = "Sakura "
   var lastName string
   lastName = "endo"

   fmt.Printf("halo %s %s!\n", firstName, lastName)
}
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the result is

result

like the code above, I write down the variable followed by the name and data type

How to declare variable using var

conditions in variable declaration with var like this

  1. Declaration without value
var <name-variable> <type-data>
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2.Declaration with value

var <name-variable> <type-data> = <value>
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Example

var Name string
var Hobby string = "Football"
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What is the use of "fmt.Printf()" ?

the function is the same as Println, but the output is defined at the beginning, in the "hello %s %s!\n" section, %s will be replaced with a string where the string is filled with the value of the 2nd to 3rd parameter and so onof the parameter.

fmt.Printf("Hi %s %s", firstname,lastname)
fmt.Printf("Hi "+  firstname + lastname + "!")
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in addition to using "%s" to connect between strings, you can also use "+" .this is called string concatenation

Multi-variable declaration

This way, we can declare multiple variables with just 1 line.
Example:

var firts,second,third string
firsts,second, third = "1","2","3"
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easy and very simple,could be more concise this way

var firts,second,third string = "1","2","3"
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or

firts,second,third := "1","2","3"
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End

Thanks for reading, don't forget to like and share and that's how to declare variable in golang!.

Golang is so much fun

Top comments (4)

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tingwei628 profile image
Tingwei

typo "Variabel"

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xvbnm48 profile image
M Fariz Wisnu prananda Author

thanks for feedback!

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xvbnm48 profile image
M Fariz Wisnu prananda Author

sorry for my english, thanks for feedback!

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