* (DEREFERENCE)

this operator (aka indirection) is used to access the data pointed to by the address.

dataType variableName = *pVariableName;

USAGE:

#include <stdio.h>
#include <stdbool.h>

int main(int argc, char* argv[])
{
  int integerVariable = 100;
  double doubleVariable = 2.71828;
  int* pIntegerVariable = &integerVariable;
  double* pDoubleVariable = &doubleVariable;
  
  int anotherIntegerVariable = *pIntegerVariable;            //anotherIntegerVariable == integerVariable
  double anotherDoubleVariable = *pDoubleVariable;           //anotherDoubleVariable == doubleVariable
  bool bAreIntegersEqual = (anotherIntegerVariable == integerVariable);
  bool bAreDoublesEqual = (anotherDoubleVariable == doubleVariable);
  
  printf("variable values integerVariable and anotherIntegerVariable are %s\n", bAreIntegersEqual ? "equal" : "not equal");
  printf("variable values doubleVariable and anotherDoubleVariable are %s\n", bAreDoublesEqual ? "equal" : "not equal");
  
  return 0;
}

 * the address-of operator obtains the address while the dereference operator obtains
   the data at an address
   
 * OUTPUT:
    variable values int1 and another_int1 are equal
    variable values doub1 and another_doub1 are equal