How to name a variable in Golang?

Golang | Naming Variables: In this tutorial, we are going to learn how to name a variable in Go Language?
Submitted by IncludeHelp, on March 25, 2021

In a Go language program, naming a variable is an important part of constructing a program. Since Golang does not care about the variable name but a variable name should be meaningful and descriptive. So, you and others (programmers) may understand the code better.

A variable must start with a letter and may contain letters, numbers, or underscore (_).

Let suppose, we want to store the roll number of a student, and we used the variable r for it.

r := 101
fmt.Println("Roll number: ", r)

r is fine as a variable name but it is neither a good nor a descriptive name.

We can use rn as a variable name instead of r.

rn := 101
fmt.Println("Roll number: ", rn)

rn is a little bit descriptive but the meaning of the variable still not clear.

A better variable name for it may rollNo or rollNumber or RollNumber.

rollNumber := 101
fmt.Println("Roll number: ", rollNumber)

The variable name rollNumber is a very good variable name, because

The first character is a letter.
It contains the "roll" and "number" both so it is clear that the variable name is using to store the roll number of the student.
Here, the first letter of the first word is in lowercase and the first letter of the second word is in uppercase – This variable naming style is known as the Camel case.