<pre><code class="lang-go">package main
//all go files in a same folder must have same pkg name
import "fmt"
func main() {
fmt.Println("hello gopher!")
}
</code></pre>
The build file is big 1.8 MB for a simple hellworld prog because it contains Runtime information, GC, Scheduler (its like whole python, jvm in an executable) It is statically linked: it does not depend on shared library.
Default is pass by value in go. To use reference use * (get underlying value) and &amp;(get memory address ). Pass by value will copy the value, Pass by reference will give the memory location.
<pre><code class="lang-go">a := "hello"
b := a
b = "world"
fmt.Println(a) // Output: "hello"
fmt.Println(b) // Output: "world"
</code></pre>
In the example above, <code>b</code> is assigned a new value "world", but the value of <code>a</code> remains unchanged at "hello". This is because the two variables are separate copies of the same value, and changes to one do not affect the other.

```go
package main
//all go files in a same folder must have same pkg name
import "fmt"
func main() {
fmt.Println("hello gopher!")
}
```

The build file is big 1.8 MB for a simple hellworld prog because it contains Runtime information, GC, Scheduler (its like whole python, jvm in an executable) It is statically linked: it does not depend on shared library.

Default is pass by value in go. To use reference use \* (get underlying value) and &(get memory address ). Pass by value will copy the value, Pass by reference will give the memory location.

```go
a := "hello"
b := a
b = "world"
fmt.Println(a) // Output: "hello"
fmt.Println(b) // Output: "world"
```

In the example above, `b` is assigned a new value "world", but the value of `a` remains unchanged at "hello". This is because the two variables are separate copies of the same value, and changes to one do not affect the other.

Go fundamentals pt1

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