Errorf formats according to a format specifier and returns the string as a value that satisfies error.

Fprint formats using the default formats for its operands and writes to w.

Fprintf formats according to a format specifier and writes to w.

Fprintln formats using the default formats for its operands and writes to w.

IsNotEmpty checks if the string is not empty.

Mask masks the input string based on its length.

Print formats using the default formats for its operands and writes to standard output.

Printf formats according to a format specifier and writes to standard output.

Println formats using the default formats for its operands and writes to standard output.

Reverse reverses the input string.

Sprint formats using the default formats for its operands and returns the resulting string.

Sprintf formats according to a format specifier and returns the resulting string.

Sprintln formats using the default formats for its operands and returns the resulting string.

Formatter is the interface implemented by values with a custom formatter.

GoStringer is implemented by any value that has a GoString method, which defines the Go syntax for that value.

State represents the printer state passed to custom formatters.

Stringer is implemented by any value that has a String method, which defines the “native” format for that value.