メモメオ Println 標準出力。
func Println
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.
func Printf
func Printf(format string, a ...interface{}) (n int, err error)
Printf formats according to a format specifier and writes to standard output. It returns the number of bytes written and any write error encountered.