Go Data Types
Variables can be of different types like int, float, struct, slice or it can be of the interface.
The general form for declaring a variable uses the keyword var:
Syntax:-
Example
when a variable is declared with var it automatically initializes it to the zero-value defined for its type. A type defines the set of values and the set of operations that can take place on those values.
GO Simple Data Type Example
Output:
int float64 bool string 0 0 false ""
Go Construct and Data Types
The Go source code is stored in .go file. The name of the file consists of lowercase letters. If the file name has several parts, it should be separated by underscore “_” .
Go file has a name or an identifier which is case sensitive like C.
For example: a, ax123, i etc.
The _ identifier is special. It is called blank identifier. It may be used in variable declarations.
It is like normal identifiers but its value is discarded, so it cannot be used anymore in the code.
It may happen that the variable, type, or function has no name and even enhance flexibility so it is called anonymous.
These are the 25 keywords for Go-code:
| break | default | func | interface | select |
| case | defer | go | map | struct |
| chan | else | goto | package | switch |
| const | fallthrough | If | range | type |
| continue | for | import | return | var |
Programs consist of keywords, constants, variables, operators, types and functions.
The following delimiters are used in constructs such as parentheses ( ), brackets [ ] and braces { }.
The following punctuation characters . , ; : and … are used.
| append | bool | byte | cap | close | complex | complex64 | complex128 | uint16 |
| copy | false | float32 | float64 | imag | int | int8 | int16 | uint32 |
| int32 | int64 | iota | len | make | new | nil | panic | uint64 |
| println | real | recover | string | true | uint | uint8 | Uintptr |
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