Introduction
A variable is a container that holds a value, which can change over time.
In Go, there are two types of variables:
Constant and Variable
const gravity float32 = 9.8 // Immutable Variable
var age int = 23 // Mutable Variable
The value of a constant (const) cannot be changed. This will result in an error.
The value of a variable (var) can be changed multiple times throughout the program.
CONST are mostly used in cases where you don't want to mistakenly change the value somewhere
How to declare them
There are 3 ways to declare a variable in GO
Method 1
var name string = "Selfish Dev"
Since Go is a strongly and statically typed language, you are required to define the type of a variable every time you create one. However , There are ways to get away from defining this using Method 2 and 3 but defining types is considered a good practice in programming because:
- It makes your code more readable.
- It helps catch errors early.
- It prevents unexpected behavior by ensuring type safety.
Method 2
var name = "Selfish Dev"
Using this method, Go automatically determines the data type of name. Since "Selfish Dev" is a string, Go assigns name the string type."
Method 3
name := "Selfish Dev"
This is the simplest way to declare a variable in Go. The := operator assigns the string "Selfish Dev" to the variable.
Things to avoid
To write clean and error-free Go code, follow these best practices:
- Avoid using special Characters in variable names
- Avoid starting variable name with a digits
- Avoid using keywords as variable name
Examples
#price - Has special Chracter
@age - Has special Chracter
1Name - Starts with a digit
14th_Player - Starting with Digit
if - Registered GO keyword
else - Registered GO keyword
Top comments (0)