How to create a fixed-size array in Go or Golang?

Published August 29, 2022

To create a fixed-size array in Go or Golang, you need to write the [] symbol (square brackets), and inside the brackets, you have to write the number of items you wish to store in the array. After the square brackets symbol, you have to specify the type of elements that you wish to store in the array followed by the {} symbol (curly brackets).

TL;DR

package main

import "fmt"

func main(){
    // create an array of `string`
    // type that can hold `5` items
    // and add a few names to it
    names := [5]string{"John Doe", "Lily Doe", "Roy Doe"}

    // log to the console
    fmt.Println(names) // [John Doe Lily Doe Roy Doe]
}

For example, let's say you need to create an array of names and should hold only 5 items in the array.

To do that, first, we can write the [] symbol (square brackets) and inside the brackets, we can specify the number of items that we wish to hold in the array, which is the number 5 then the write type of the elements in the array which is the type of string without any whitespace followed by the {} symbol (curly brackets).

It can be done like this,

package main

func main(){
    // create an array of `string`
    // type that can hold `5` items
    [5]string{}
}

Now let's assign the array to a variable called names like this,

package main

func main(){
    // create an array of `string`
    // type that can hold `5` items
    names := [5]string{}
}

To add items to the array, we can simply add the string type elements inside the {} symbol separated by the , symbol (comma).

It can be done like this,

package main

func main(){
    // create an array of `string`
    // type that can hold `5` items
    // and add a few names to it
    names := [5]string{"John Doe", "Lily Doe", "Roy Doe"}
}

Finally, let's print the names array to the console to see the added array elements.

It can be done like this,

package main

import "fmt"

func main(){
    // create an array of `string`
    // type that can hold `5` items
    // and add a few names to it
    names := [5]string{"John Doe", "Lily Doe", "Roy Doe"}

    // log to the console
    fmt.Println(names) // [John Doe Lily Doe Roy Doe]
}

As you can see that the names have been logged to the console which proves that the names array is successfully created.

See the above code live in The Go Playground.

That's all 😃.

Feel free to share if you found this useful 😃.


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