Recommended textbooks for you  Microsoft Visual C# Publisher:Cengage Learning, EBK JAVA PROGRAMMING Publisher:CENGAGE LEARNING - CONSIGNMENT EBK JAVA PROGRAMMING Publisher:CENGAGE LEARNING - CONSIGNMENT Programming Logic & Design Comprehensive C++ Programming: From Problem Analysis to Program... Publisher:Cengage Learning Microsoft Visual C# ISBN:9781337102100 Author:Joyce, Farrell. Publisher:Cengage Learning, EBK JAVA PROGRAMMING ISBN:9781337671385 Author:FARRELL Publisher:CENGAGE LEARNING - CONSIGNMENT EBK JAVA PROGRAMMING ISBN:9781305480537 Author:FARRELL Publisher:CENGAGE LEARNING - CONSIGNMENT Programming Logic & Design Comprehensive ISBN:9781337669405 Author:FARRELL Publisher:Cengage C++ Programming: From Problem Analysis to Program... ISBN:9781337102087 Author:D. S. Malik Publisher:Cengage Learning
A scope is a region of the program and broadly speaking there are three places, where variables can be declared: Here let us explain what local and global variables are. Local VariablesVariables that are declared inside a function or block are local variables. They can be used only by statements that are inside that function or block of code. Local variables are not known to functions outside their own. Following is the example using local variables: #include <iostream> using namespace std; int main () { // Local variable declaration: int a, b; int c; // actual initialization a = 10; b = 20; c = a + b; cout << c; return 0; }Global VariablesGlobal variables are defined outside of all the functions, usually on top of the program. The global variables will hold their type throughout the life-time of your program. A global variable can be accessed by any function. That is, a global variable is available for use throughout your entire program after its declaration. Following is the example using global and local variables: #include <iostream> using namespace std; // Global variable declaration: int g; int main () { // Local variable declaration: int a, b; // actual initialization a = 10; b = 20; g = a + b; cout << g; return 0; }A program can have same name for local and global variables but value of local variable inside a function will take preference. For example: #include <iostream> using namespace std; // Global variable declaration: int g = 20; int main () { // Local variable declaration: int g = 10; cout << g; return 0; }When the above code is compiled and executed, it produces the following result: 10 |
When a variable is declared within a method and its scope is within the method it is known as a(n)
Postagens relacionadas
direito autoral © 2024 estudarpara Inc.
