Answers for "what is a variable in cpp"

c++ declare variable

std::string str = "text";	// stores a string
int    foo = 3;				// stores any integer
float  bar = 3.14;			// stores 32 bit number
double baz = 3.14159265;	// stores 64 bit number

what is a variable in cpp

Variable is simply a name or a label given to a memory location.

C++ variables

Create a variable called myNum of type int and assign it the value 15:
  int myNum = 15;
cout << myNum;