Dereference, example

int x, y;

int *pt;

pt = &x; /* pt gets the address of x */

x = 3; /* x gets 3 */

y = *pt; /* y gets the value that the pointer pt points to. Since pt has the address of x, y get the value of x. That is, y gets 3 */

*pt = 4; /* The variable at the address that pt is pointing to gets the value 4. That is, x reassigns to the value 4 */

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