Understanding Various Types in Go Lang
In Go, almost everything is treated as a type, offering a strong foundation for building robust and efficient programs. Let's explore the various types available in Go:
Identifiers in Go
In Go, an identifier is a name used to identify variables, functions, or any other user-defined items. Identifiers follow a specific pattern:
identifier = letter { letter | unicode_digit }
Here are some rules regarding identifiers in Go:
It starts with a letter A to Z or a to z, or an underscore _.
It can be followed by zero or more letters, underscores, and digits (0 to 9).
Punctuation characters such as @, $, and % are not allowed within identifiers.
Go is case-sensitive, meaning Manpower and manpower are treated as different identifiers.
Here are some examples of valid identifiers in Go:
mahesh kumar abc move_name a_123
myname50 _temp j a23b9 retVal
Whitespace in Go
Whitespace in Go refers to blanks, tabs, newline characters, and comments. Here's how whitespace is treated in Go:
A line containing only whitespace, possibly with a comment, is known as a blank line, and the Go compiler completely ignores it.
Whitespace characters separate different parts of a statement, allowing the compiler to distinguish between elements.
While whitespace characters are not strictly necessary between certain elements in a statement, they can be used for readability purposes.
For example, consider the following statements:
var age int;
Here, at least one whitespace character (typically a space) is required between int and age for the compiler to distinguish them.
However, in this statement:
fruit = apples + oranges; // get the total fruit
No whitespace characters are necessary between fruit and =, or between = and apples, although they can be included for readability.
Understanding how whitespace functions in Go is essential for writing clean and understandable code.