EXPORTED NAMES
After importing a package, you can refer to the names it exports.
In Go, a name is exported if it begins with a capital letter.
Foo
is an exported name, as is FOO
. The name foo
is not exported.
Run the code. Then rename math.pi
to math.Pi
and try it again.
Example :
package main
import (
“fmt”
“math”
)
func main() {
fmt.Println(math.pi)
}
output:
prog.go:9: cannot refer to unexported name math.pi prog.go:9: undefined: math.pi
after renaming math.pi to math.Pi
package main
import (
“fmt”
“math”
)
func main() {
fmt.Println(math.Pi)
}
output:
3.141592653589793