Declaration of Variable in Programming
In programming, the declaration of variables involves specifying the type and name of a variable before it is used in the program. The syntax can vary slightly between programming languages, but the fundamental concept remains consistent.
#include <iostream>
using namespace std;
int main()
{
// Syntax: datatype variable_name;
int age;
double price;
char grade;
return 0;
}
/*package whatever //do not write package name here */
import java.io.*;
class GFG {
public static void main(String[] args)
{
// Syntax: datatype variable_name;
int age;
double price;
char grade;
}
}
# No explicit declaration is required in Python; variables are dynamically typed.
age = 25
price = 10.99
grade = 'A'
using System;
class Program
{
static void Main()
{
// Suppress warnings for unused variables
#pragma warning disable CS0168
int age;
double price;
char grade;
#pragma warning restore CS0168
// These variables are declared but not used in this code block
}
}
// Syntax: var/let/const variable_name;
var age;
let price;
const grade = 'A'; // Note: Constants need to be initialized during declaration.
Output
Variable in Programming
In programming, we often need a named storage location to store the data or values. Using variables, we can store the data in our program and access it afterward. In this article, we will learn about variables in programming, their types, declarations, initialization, naming conventions, etc.
Table of Content
- What are Variables In Programming?
- Declaration of Variables In Programming
- Initialization of Variables In Programming
- Types of Variables In Programming
- Difference between Variable and Constant
- Difference between Local variables and Global Variables
- Naming Conventions
- Scope of a variable