What are the 3 rules for naming a variable?

Answered by Jason Smith

When it comes to naming variables in Go, there are three important rules to keep in mind. These rules help ensure that your variable names are clear, meaningful, and follow the conventions of the Go programming language.

1. Start with a letter or underscore (_): The first rule for naming a variable in Go is that it must start with a letter or an underscore character. This means that you cannot begin a variable name with a digit or any other special character. For example, valid variable names could be “name”, “_count”, or “totalScore”. On the other hand, names like “2ndPlace” or “$price” would be invalid.

2. Use only alphanumeric characters and underscores: The second rule is that a variable name can only contain alphanumeric characters (letters and digits) and underscores. This means that you cannot use any special characters, spaces, or punctuation marks in a variable name. For example, “numPlayers”, “average_score”, or “first_name” are all valid variable names. However, names like “high-score”, “my-variable”, or “name!” would not be allowed.

3. Avoid using reserved words: The third rule is to avoid using reserved words as variable names. Reserved words are words that have a special meaning in the Go language and are used to define various programming constructs or operations. Some examples of reserved words in Go include “if”, “for”, “func”, and “return”. Using these reserved words as variable names would lead to a syntax error. To avoid confusion and potential errors, it is best to choose variable names that are not already used by the Go language.

Following these three rules for naming variables in Go will help make your code more readable and maintainable. By using meaningful and descriptive names, you can also improve the clarity and understanding of your code for both yourself and other developers who may work with your code in the future.