I have heard that it is always good to define variable type when you declare a variable but wherever I see Go code, be it any package or library or blog, I find the short way to define variables without mentioning the type.
Is not necessary to always write the type of a variable. Go has type inference with the := operator, but sometimes you have to declare it.
You can declare a variable in 2 ways:
var age intage := 12On the first one you declare a variable called age of type int but no value. You can set the value later or assign it right there as var age int = 12
On the second one you declare a variable called age of type int (because 12 is int)
Local variables usually get assigned and declared with := where package variables is good to declare with var x Type