Computer Science / Unit 4 CS 0194 short lesson, about 20 seconds
The Pointer
Captions available
The idea
A pointer is a variable holding the memory address of another variable — the mechanism giving a program direct reach into memory's layout.
In practice
A slip of paper carrying an apartment's address is not the apartment, and it finds the apartment.
Where people slip
Direct reach cuts both ways; the address can be wrong.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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