Difference between Local Variable and Global variables
Aspect | Local Variables | Global Variables |
---|---|---|
Scope | Limited to the block of code | Accessible throughout the program |
Declaration | Typically within functions or specific blocks | Outside of any function or block |
Access | Accessible only within the block where they are declared | Accessible from any part of the program |
Lifetime | Created when the block is entered and destroyed when it exits | Retain their value throughout the lifetime of the program |
Name conflicts | Can have the same name as variables in other blocks | Should be used carefully to avoid unintended side effects |
Usage | Temporary storage, specific to a block of code | Values that need to be accessed and modified by multiple parts of the program |
Difference between Local Variable and Global variable
Local variables are declared within a specific block of code, such as a function or method, and have limited scope and lifetime, existing only within that block. Global variables, on the other hand, are declared outside of any function and can be accessed from any part of the program, persisting throughout its execution.