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Variable in C++, how to declard varible in C++,int float,char

 Variable in C++, how to declare variable in C++,int float,char

Variable in C++

 

In every C++ program we need to declare some variable in our code.

What is the variable?

This question arises in our mind.
Variable in basically a memory resolved in RAM and it can store the value which is assign to it. Note: Every variable has its own data type. For example we need to store the integer 2 and 3 in C++ so in first step we will declare two variables for which the memory will reserved in the Ram.



Example
int a;
int b;
These are two variables which we have defined. In second step we will assign values to these variables.
a=2;
b=3; 
These values then stored in the reserved memory in the RAM. We can directly define a variable and assign value to it in one step.


For example.
int var1=3;
float result= 5;
We can also directly define more than one variable in the single line.
int a,b,c;
Examples
#include<iostream.h>
int main( )
{
int a;
float b;
char c;
a=2;
b=3.14;
c=’A’;
cout<<a;
cout<<b;
cout<<c;
return 0;
};
Output : 2  3.14  A 
Example
#include<iostream.h>
int main( )
{
int a=3;
int b=2;
int  c;
c=a+b;
cout<<c;
return 0;
};
output:5