Printing and variables

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What does the following code print to the console? package main import "fmt" func main() { fmt.Println("hi there") }	`"hi there"` is printed to the console. If this script is stored in a `hi.go` file it can be executed with `go run hi.go`. Executable commands must always use package main. `import "fmt"` imports the `fmt` package. This allows you to call the `Println()` function that's defined in `fmt` and print values to the console. The `go run` command runs the `main()` function.
What does the following code print? fmt.Println(5)	`5` is printed. The `fmt.Println()` function can be used to print integers, strings, and other types of values.
What does the following command line command return when run in the terminal? godoc fmt Println	The command returns documentation on the `fmt.Println()` function. func Println(a ...interface{}) (n int, err error) Println formats using the default formats for its operands and writes to standard output. Spaces are always added between operands and a newline is appended. It returns the number of bytes written and any write error encountered
What does the following code print to the terminal? var x string = "hi" fmt.Println(x)	`hi` is printed to the console. The variable `x` is assigned to the string `"hi"`. The `fmt.Println()` function is used to print the x variable to the console.
What does the following code print to the terminal? var num string = 5 fmt.Println(num)	This code throws the following error: `cannot use 5 (type int) as type string in assignment`. The `num` variable is typed as a `string`, so it can only be assigned to `string` values. It cannot be assigned to 5, which is an integer (`int`) value.
What does the following code print to the terminal? var coolNum int coolNum = 8 fmt.Println(coolNum)	`8` is printed to the terminal. The `coolNum` variable is first declared as an `int` variable. Then `coolNum` is assigned to the value 8. Finally, the `fmt.Println()` function is used to print `coolNum`.
What does the following code print to the terminal? var goat string goat = "mj" goat = "lebron" fmt.Println(goat)	`lebron` is printed to the console. The `goat` variable was initially assigned to the `"mj"` string. The `goat` variable was then reassigned to the `"lebron"` string. Variables can be reassigned in go.
What does the following code print to the terminal? gretzkyNum := 99 fmt.Println(gretzkyNum)	The `gretzkyNum` variable is assigned to the value `99`. In Go, `:=` is for variable declaration and assignment. Go infers the `gretzkyNum` type to be `int` based on the value.
What does the following code print to the terminal? myName := "matthew" myName = 888 fmt.Println(myName)	This code throws the following error: `cannot use 888 (type int) as type string in assignment`. The `myName` variable is initially assigned to `"matthew"` and declared as a string. `myName = 888` causes an error to be thrown because the `myName` variable is declared as a string and cannot be reassigned to an integer value.
What does the following code print to the terminal? myDinner = "hot dog" fmt.Println(myDinner)	This code throws the following error: `undefined: myDinner`. The `myDinner` variable is assigned, but it's not declared with a type. This code works if `:=` is used. myDinner := "hot dog" fmt.Println(myDinner) It also can work if the variable type is explicitly declared. var myDinner string = "hot dog" fmt.Println(myDinner)
What does the following code print to the terminal? const Pi = 3.14 fmt.Println(Pi)	`3.14` is printed to the terminal. `const` stands for constant. The constant `Pi` is assigned to the value `3.14`. Constants cannot be declared using the `:=` syntax.
What does the following code print to the terminal? const Greeting = "Hello!" Greeting = "Hola!" fmt.Println(Greeting)	This code throws the following error: `cannot assign to Greeting`. Go constants cannot be reassigned.