Fatal is equivalent to Print() followed by a call to os.Exit(1).

Fatalf is equivalent to Printf() followed by a call to os.Exit(1).

Fatalln is equivalent to Println() followed by a call to os.Exit(1).

Panic is equivalent to Print() followed by a call to panic().

Panicf is equivalent to Printf() followed by a call to panic().

Panicln is equivalent to Println() followed by a call to panic().

Print calls Output to print to the standard logger.

Printf calls Output to print to the standard logger.

Println calls Output to print to the standard logger.

SetPrefix sets the output prefix for the standard logger.