Global and Local Variables with the Same Name (2024)

FAQs

Global and Local Variables with the Same Name? ›

It is usually not a good programming practice to give different variables the same names. If a global and a local variable with the same name are in scope, which means accessible, at the same time, your code can access only the local variable.

a) It is perfectly fine to name local variables the same as globals, not needing to bother about the existence of a local name somewhere else in the program is one of the biggest virtues of scopes. The assignments in let are in nested scopes, so x_glob = x is evaluated in one scope, x = x_glob .

What happens if a local variable exists with the same name as the global variable you want to access? Explanation: If a local variable exists with the same name as the local variable that you want to access, then the global variable is shadowed. That is, preference is given to the local variable.

If you declare at local variable and a global variable exists with the same name, the local variable well override the global variable.

If you create a variable with the same name inside a function, this variable will be local, and can only be used inside the function. The global variable with the same name will remain as it was, global and with the original value.

Expert-Verified Answer

You can declare two variables with the same name in two nested blocks in a method, a method as a formal parameter and a local variable, and different methods in a class. However, you cannot declare two variables with the same name in a single block.

A local variable and a global variable may not have the same name within a program. See an expert-written answer! A static variable that is defined within a function is initalized only once, the first time it is called. It is possible for a function to have some parameters with default arguments and some without.

Answer. Reason — If a local variable is having the same name as that of a global class element, the system resolves the name to the most local scope available i.e., most local variable with the same name will be considered. The global variable will be hidden by the local variable.

Within the body of a function, a local variable takes precedence over a global variable with the same name. If you declare a local variable or function parameter with the same name as a global variable, you effectively hide the global variable.

17) In which process, a local variable has the same name as one of the instance variables? Explanation: There are following reasons for considering a variable shadowing, they are listed below: When we define a variable in a local scope with a variable name same as the name of a variable defined in an instance scope.

Do global variables override local variables? ›

All variables are always defined in Global Variables. If the variable is environment specific you will only override it on Local Variables in your scenario code. Otherwise you can override the variable on Global Variables.

Parameter passing - allows the values of local variables within the main program to be passed to sub-programs without the need to use global variables. The value of these variables (or a copy of the value of these variables) is passed as a parameter to and from sub-programs as necessary.

If a global and a local variable with the same name are in scope, which means accessible, at the same time, your code can access only the local variable.

When declaring a local variable with the same name as a global variable in PHP, the local variable takes precedence within its scope, but it does not affect the global variable outside of its scope. Understanding variable scope is important for writing maintainable and bug-free code.

If the variables with the same name are present in a function or block, then the variable declared inside that function (local variable) will get more precedence than global. After the execution of that function, the variable goes out of scope and hence global variable will get more precedence.

Yes it works like this as variables of same names are allowed provided that they are in different scopes. "x" is both defined in global scope (global variable) and a local scope (in foo() as a parameter).

The point about local variables in functions is that they are local. You can use the same name without consequence, you are able to use the same parameter names in different function.