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Learn Go: Variables and Types
Multiple Variable Declaration

So far we’ve been declaring variables one by one, each on their own separate line. But Go actually allows us to declare multiple variables on a single line, in fact, there’s a few different syntaxes!

Let’s start with declaring without assigning a value:

var part1, part2 string part1 = "To be..." part2 = "Not to be..."

Above, we declared both part1 and part2 on the same line both with the same type. If we’re using this syntax, both variables must be the same type.

If we already know what values we want to assign our variables we can use := like so:

quote, fact := "Bears, Beets, Battlestar Galactica", true fmt.Println(quote) // Prints: Bears, Beets, Battlestar Galactica fmt.Println(fact) // Prints: true

In the example above, we declare both quote and fact in the same line with one operator (:=). These variables are then assigned their respective values based on the ordering of variables and value. Since quote is the first variable, and the string "Bears, Beets, Battlestar Galactica" is the first value, quote has a value of "Bears, Beets, Battlestar Galactica". Similarly, fact then is assigned the value true.

Instructions

1.

On a single line, declare two int32 variables: one named magicNum and the other powerLevel.

2.

Assign magicNum a value of 2048 and powerLevel a value of 9001.

Once the values are assigned uncomment the first print statement.

3.

In a single line, declare and initialize two variables:

  • amount with a value of 10.
  • unit with a value of "doll hairs".

Then, uncomment the second print statement.

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