Learn C: Pointers and Memory

                                
// Declaring a pointer to an integer
int* ptr;

// Declaring a pointer to a float
float *ptr;

                              

                                
// Pointer to an integer
int* numPtr;

// Pointer to a float
float *floatPtr;

                              

                                
// Assume 'var' is an integer variable
int var = 10;
int* ptr = &var // ptr now holds the address of var

                              

                                
// Assume 'ptr' is a pointer to an integer
int value = *ptr; // Gets the value stored at the address ptr points to

                              

                                
// Incrementing a pointer moves it to the next memory location
int* ptr = &var
ptr++; // Moves to the next integer location

                              

                                
// Accessing array elements with a pointer
int arr[] = {1, 2, 3};
int* ptr = arr; // Points to the first element
int firstElement = *ptr; // 1
int secondElement = *(ptr + 1); // 2