Golang in sixty seconds — variables

To create a new variable in Go we use thevar keyword, followed by the variable name (x) and type (string) and then assign it a value (“Hello”).

var x string = “Hello”

Assigning value is optional, so we could also write it

var x string
x = “Hello”

Variables are mutable. This means they can be changed. So we can change x from“Hello” to something else:

x = "Hi"

When creating a new variable with a starting value, Go can infer the type, so we can do this:

var age = 5

Generally you should use the shorter syntax for this whenever possible:

age := 5

Constants are a special type of variable that are immutable. This means it cannot be reassigned. They are created the same way as variables except you use theconst keyword instead of var . Again, Go can infer the type from the assigned value.

const x = “Hello”
// The following line would create an error
x = "Hi" 

You can also assign multiple variables or constants (using const instead of var) at once:

var(
  a = 5
  b = 10
  c = 15
)

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