String and slice of bytes%s | the uninterpreted bytes of the string or slice | %q | a double-quoted string safely escaped with Go syntax | %x | base 16, lower-case, two characters per byte | %X | base 16, upper-case, two characters per byte |
General%v | The value in a default format. When printing structs, the plus flag (%+v) adds field names. | %#v | a Go-syntax representation of the value | %T | a Go-syntax representation of the type of the value | %% | a literal percent sign; consumes no value |
The default format for %vbool: | %t | int, int8 etc.: | %d | uint, uint8 etc.: | %d, %x if printed with %#v | float32, complex64, etc: | %g | string: | %s | chan: | %p | pointer: | %p |
Other flags+ | always print a sign for numeric values; guarantee ASCII-only output for %q (%+q). | - | pad with spaces on the right rather than the left (left-justify the field). | # | alternate format: add leading 0 for octal (%#o), 0x for hex (%#x); 0X for hex (%#X); suppress 0x for %p (%#p); for %q, print a raw (backquoted) string if strconv.CanBackquote returns true; | ' ' (space) | leave a space for elided sign in numbers (% d); put spaces between bytes printing strings or slices in hex (% x, % X). | 0 | pad with leading zeros rather than spaces; for numbers, this moves the padding after the sign. |
| | Integer%b | base 2 | %c | the character represented by the corresponding Unicode code point | %d | base 10 | %o | base 8 | %q | a single-quoted character literal safely escaped with Go syntax | %x | base 16, with lower-case letters for a-f | %X | base 16, with upper-case letters for A-F | %U | Unicode format: U+1234; same as "U+%04X" |
Floating-point and complex constituents%b | decimalless scientific notation with exponent a power of two, in the manner of strconv.FormatFloat with the 'b' format, e.g. -123456p-78 | %e | scientific notation, e.g. -1.234456e+78 | %E | scientific notation, e.g. -1.234456E+78 | %f | decimal point but no exponent, e.g. 123.456 | %F | synonym for %f | %g | %e for large exponents, %f otherwise | %G | %E for large exponents, %F otherwise |
Floating-point Precision%f | default width, default precision | %9f | width 9, default precision | %.2f | default width, precision 2 | %9.2f | width 9, precision 2 | %9.f | width 9, precision 0 |
Pointer%p | base 16 notation, with leading 0x |
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Nice! Starting now with GoLang this will be very helpful
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