Golang: String Format

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%%	prints a single %
%b	binary integer
%c	a character represented by the corresponding Unicode code point
%d	decimal integer
%e	scientific notation (mantissa/exponent), lowercase
%E	scientific notation (mantissa/exponent), uppercase
%f	decimal floating point, lowercase
%F	decimal floating point, uppercase
%g	the shortest representation of %e or %f
%G	the shortest representation of %E or %F
%o	octal integer
%O	octal integer with 0o prefix
%p	pointer address
%q	a quoted character
%s	a string
%t	boolean, the word true or false
%T	a Go-syntax representation of the type of the value
%U	Unicode escape sequence
%v	value, default format
%+v	value, Display field names
%#v	value, Go-syntax representation of the value
%x	hexadecimal integer lowercase
%X	hexadecimal integer uppercase

Argument index

fmt.Printf("%[1]s %[3]s %[2]s", "apple", "banana", "orange")
# => "apple" "orange" "banana"

fmt.Printf("%[1]s %[1]q", "apple")
# => apple, "apple"

References:

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