1. C021TV-I2-S2

2. I.2 Algorithmics Tasks Elementary instructions Algorithmic culture
Variables
Elementary instructions
Algorithmic culture

3. Variable ?
A variable is a memory space where the program stores a value or a complex data structure.
A variable is expected to change during execution of the program. 2

4. Variable ?
A variable is a memory space where the program storages a value or a complex data structure.
A variable is expected to change during execution of the program.
Examples:
The number of followers, of views on Youtube, of likes. . .(an integer)
A pupil’s average (a real, or rather a floating point number)
All the class’s marks (a chart, a chart of charts, a database)
A hash table, a doubly linked list
. . . 2

5. A variable Must be created (depends on the language)
May be assigned: i ← 0
May be modified: i ← i+1
May be the program’s entry.

6. Variable types integers floating point numbers chart of. . .
Pointers towards. . .
Composed structures of. . .and (and . . .)
. . .
a characters chain
an interval