Java — Scope

Local scope

public static void main(String[] args) {
    int x = 10;  // Local to main
}

Block scope

for (int i = 0; i < 5; i++) {
    // i is only available here
}
// i is not available here

Class scope

public class MyClass {
    int classVar;  // Available to all methods
    
    public void myMethod() {
        int localVar;  // Only in this method
    }
}

Shadowing

int x = 10;
{
    int x = 20;  // Shadows outer x
}

Mini Practice

1. Understand local scope
2. Use block scope
3. Practice class scope
4. Avoid shadowing

Up Next

Continue with Recursion - Recursive functions.