Difference between := and = operators in Go

Question

What is the difference between the = and := operators, and what are the use cases for them? They both seem to be for an assignment?

Answer 1

:= declares and assigns, = just assigns

It's useful when you don't want to fill up your code with type or struct declarations.

// Usage with =
var i int
var U, V, W float64
var k = 0
var x, y float32 = -1, -2

// Usage with :=
i, j := 0, 10
f := func() int { return 7 }
ch := make(chan int)