What are local variables?

Local variables are variables declared inside a block of code (function, method, loop, conditional statement).

Their characteristics:

• Scope: Accessible only within the block where they are declared.
• Lifetime: Created upon entering the block and destroyed upon exiting.
• Initialization: Usually require explicit initialization before use (some languages automatically initialize primitive types to zero).

Example in Python:

def my_function():
    local_variable = 10  # Local variable
    print(local_variable)

# print(local_variable)  # Error, local_variable is not accessible here

my_function()

Example in Java:

public class Example {
    public void myMethod() {
        int localVariable = 20; // Local variable
        System.out.println(localVariable);
    }

    public static void main(String[] args) {
        // System.out.println(localVariable); // Error, localVariable is not accessible here
        Example obj = new Example();
        obj.myMethod();
    }
}

Using local variables helps prevent naming conflicts and simplifies memory management, as memory for them is allocated and freed automatically.