Use of sizeof()
This function is used for finding the size of any variable include array ,structure and class .Syntax:
if we want to find the size of integer variable :int a,b;
b=10;
a=sizeof(b);
cout<< b <<endl ;
or
cout <<sizeof(b)<<endl;
if we want to find the size of general data type :
cout<<sizeof(int)<<endl;
cout<<sizeof(float)<<endl;
cout<<sizeof(bool)<<endl;