Pure Method in Java

Pure Method

A pure method is a method that adheres to the following principles:

1. No Side Effects: A pure method does not alter any external state or variables. It only operates on its input parameters and returns a result based solely on those inputs.

2. Deterministic: For the same set of input values, a pure method always produces the same output. The output is predictable and consistent.

3. No External Dependencies: It does not rely on or affect any external state, class variables, or other methods. The behavior of a pure method is entirely contained within itself.

Example:

public int add(int a, int b) {
    return a + b; // Only depends on input parameters
}

• No Side Effects: The method does not modify any variables outside of its scope.
• Deterministic: For the same values of a and b, the method will always return the same result.
• No External Dependencies: It only depends on its parameters.