Table of Contents
- 1 What is difference between local and global variable in C?
- 2 What are local variable and global variable?
- 3 When the global variable and local variable have same name the function will use ___?
- 4 Can two different function have local class with same name?
- 5 What is the difference between C and C++ variables?
- 6 What is the difference between UB and local variable?
What is difference between local and global variable in C?
The main difference between Global and local variables is that global variables can be accessed globally in the entire program, whereas local variables can be accessed only within the function or block in which they are defined.
What happens if a global and local variable have 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.
What are local variable and global variable?
Global variables are those which are not defined inside any function and have a global scope whereas local variables are those which are defined inside a function and its scope is limited to that function only.
Can a local and a global variable have the same name in C justify your opinion?
You can declare local variables with the same name as a global variable, but the local variable will shadow the global. As long as your local a is in scope, the symbol a refers to your local variable.
When the global variable and local variable have same name the function will use ___?
5. 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.
What is the difference between local variable and data member?
1. A data member belongs to an object of a class whereas local variable belongs to its current scope. 2. A local variable is declared within the body of a function and can be used only from the point at which it is declared to the immediately following closing brace.
Can two different function have local class with same name?
Can two different functions have local class with same name? Explanation: The local classes can have same name if they belong to different functions. The classes would be local to those specific functions and hence can have same name. This is same as that of local variables concept.
What is the difference between local variable and global variable in C?
In C, if we compare local and global variable there are the following differences: A local variable is declared inside a function or a block and its scope is always limited to that particular function or block. It remains alive until that particular block or function completes its execution.
What is the difference between C and C++ variables?
In C, all the variables are declared at the starting of the program. In C++, variables can be declared, at any point of time, before they are used in the instructions. Variables are further classified into ‘local’ and ‘global’ variable, which is the main topic of our discussion.
How to declare a variable in C++?
In C++, variables can be declared, at any point of time, before they are used in the instructions. Variables are classified into ‘local’ and ‘global’ variable, which is the main topic of our discussion. Here the main difference between local and global variable is that a local variable is declared inside a function block.
What is the difference between UB and local variable?
The local variable always hides a global one of the same name as soon as it’s declared, so your code is basically self-initialization, which is UB. – Mints97 Mar 13 ’15 at 16:20