0 Basic Science Golang-2-helloworld

This is a creation in Article, where the information may have evolved or changed.

 
  Package Main

Import "FMT"

Func Main () {

Fmt. Print ("Hello, world\n")

}

Run output HelloWorld;

Content analysis:
The FMT:FMT package implements the format I/O functions, similar to the C printf and scanf. The format placeholder is derived from C, but is simpler than c.

So so:

%v the default format for the corresponding value. When the structure is printed, the "Plus" mark (%+v) adds a field name of% #v相应值的Go语法表示%t the corresponding value of the type of the go syntax to represent the percent percent of the literal percentile, not the value of the placeholder

Boolean:

%t the word True or false.

Integer:

The%b binary represents the character%d denoted by the corresponding Unicode code point in%c, the decimal representation of the%o octal representation of the character literal that surrounds the%q single quotation mark, which is safely escaped by the go syntax in the hexadecimal notation, in lowercase a-f%x hexadecimal notation, and in uppercase letters a-f% Uunicode format: u+1234, equivalent to "u+%04x"

Floating point number and its compound composition:

%b is a scientific notation of the power of the exponent two without fractional parts, with StrConv. The formatfloat ' B ' conversion format is consistent. For example, -123456p-78%e scientific notation, such as the -1234.456e+78%e scientific notation, for example -1234.456e+78%f has a decimal point but no exponent, for example 123.456%g chooses%e or%f as appropriate to produce a more compact (no end 0) output% G Select%E or%f as appropriate to produce a more compact (no end 0) output

String and byte slices:

%s string or slice without interpretation byte%q double quotation marks around the string, safely escaped by go syntax%x 16, lowercase letters, two characters per byte%x 16, uppercase letters, two characters per byte

Pointer:

%p hexadecimal representation, prefix 0x

Thanks for the information provided by the Go language Chinese web