Question

what is the difference between local variable and global variable also giving suitable C++ cøde to illustrate both​

Answer 1

Answer

A variable which is declared within the body of a function and available only within the function is known as local variable.

A variable which is declared outside any function and available to all functions in a program is known as global variable.

To illustrate this, below is the programming example ↓

#include<iostream.h>

float area;                              //Global variable

void cirarea()

{

   float r;                                //Local variable

   cin>>r;

   area=3.14*r*r;

   cout<<area;

}

void rectarea()

{

   float l,b;                             //Local variable

   cin>>l;

   cin>>b;

   area=l*b;

   cout<<area;

}

void main()

{

   cirarea();

   rectarea();

}