Appendix B. Formatting cheat sheet
Go offers several verbs that are passed to printing functions to format Go values. In this appendix, we present the most known verbs and special values that can be passed to these functions. You can refer to these tables all along the book. The result for each of the following entries was generated by fmt.Printf("{{verb}}", value).
Table B.1. Default
| Verb |
Output for fmt.Printf("{{Verb}}", []int64{0, 1}) |
Description |
%v |
[0 1] |
Default format |
%#v |
[]int64{0, 1}
|
Go-syntax format |
%T |
[]int64 |
Type of the value |
Table B.2. Integers
| Verb |
Output for fmt.Printf("{{Verb}}", 15) |
Description |
%d |
15 |
Base 10 |
%+d |
+15 |
Always show the sign |
%4d |
␣␣ |
Pad to 4 characters with spaces, right justified |
%-4d |
|
Pad to 4 characters with spaces, left justified |
%04d |
0015 |
Pad to 4 characters with prefixing zeros |
%b |
1111 |
Base 2 (binary) |
%o |
17 |
Base 8 (octal) |
%x |
f |
Base 16, lowercase |
%X |
F |
Base 16, uppercase |
%#x |
0xf |
Base 16 with leading 0x |