Go Language basic type (1)

• Variable
• Use the keyword var to define the variable and automatically initialize it to a value of 0. If you provide an initialization value, you can omit the variable type, which is automatically inferred by the compiler.
• You can define a variable inside a function by using the : = method

• Func Main () {x:}

• Multiple variables can be defined at once

• " ABC ", 123var (a intb float32) func main () {n, S:"Hello, world! " println (x, S, N)}

• _ is used to ignore the value, the placeholder.
  
  
• The compiler uses unused local variables as errors
• Constant
• The constant value must be a number, string, and Boolean value that can be determined by the compilation period.

• const x, y int = 1, 2//"Hello, world! " ////= ten,= false"xxx" // No compilation errors are raised with local constants. }

• In a constant group, if the type and initialization values are not provided, it is treated the same as the previous constant.
• The constant value can also be Len, cap, unsafe. The function return value of the result can be determined by the compile period such as Sizeof
• Enumeration
• The IOTA keyword defines the self-increment enumeration value in a constant group that starts at 0 by the row count.

• = Iota////1//2//3//4//5//6)

• If Iota is interrupted, it must be explicitly restored.

• = Iota////1"C" // CD       //= Iota//4  //5)

• Basic type

Go Language basic type (1)