char lastChar(const char *str){     char last;     //loop over the string and go uptill end of the string \0     while(*str !='\0'){         str++; // increment pointer         last = *str;  //store the current character to the last variable     }          return last; //last character is returned }

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Concept of memory addresses in pointers

The concept of pointers in high-level languages was introduced in C programming. Pointers are simply the variables that are used to store memory addresses of another variable. These special variables are generally used in the languages such as C Programming and C++ Programming, where it allows the programmer to work more deeply with memory and its addresses.