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

In Go, := is for declaration + assignment, whereas = is for assignment only.

For example, var foo int = 10 is the same as foo := 10.

Answer 2

“:=” use to do declaration and initilization at the same time, following is an example.

Usage of “=”

var i int

i = 10

https://play.golang.org/p/RU88ty_SGa

Usage of “:=”

i := 10

https://play.golang.org/p/XBdjBh-DQB

Answer 3

Only = is the assignment operator.

:= is a part of the syntax of the Short variable declarations clause.