JuniorTheoryCommon

What happens when this program is built and run?

package main

import (
    "fmt"
    "strings"
)

func main() {
    fmt.Println(strings.ToUpper("go"), strings.toLower("GO"))
}

It does not compile

Expecting GO go: import opens only exported names, those starting with a capital letter, so strings.toLower is undefined.
Expecting a run-time error or a skipped call: the compiler checks every name first and stops with undefined: strings.toLower.

JuniorTheoryCommon

package main

import (
    "fmt"
    "strings"
)

func main() {
    fmt.Println(strings.ToUpper("go"), strings.toLower("GO"))
}

It does not compile

Expecting GO go: import opens only exported names, those starting with a capital letter, so strings.toLower is undefined.
Expecting a run-time error or a skipped call: the compiler checks every name first and stops with undefined: strings.toLower.