Naming variables

Learn camelCase and valid naming rules.

Java variable names use camelCase: the first word starts lowercase, the following words start uppercase. Example: studentGrade, totalPrice.

Naming rules:

Descriptive names make code more readable.

Exercise Define a camelCase variable

Write a Main class with a main method. Assign 85 to int studentGrade. Print it with println.

Show example solution

public class Main {
    public static void main(String[] args) {
        int studentGrade = 85;
        System.out.println(studentGrade);
    }
}

A good variable name clearly says what it holds. Avoid vague names like x or data. Names like userCount, totalAmount are descriptive.

English names make the code easier to share internationally. Non-ASCII letters are technically allowed but not recommended.

Abbreviations should be consistent: either always cnt or always count. Mixing hurts readability.