Data

Data

1. Processed

   • Data entry: operation done through an input device; data go straight to the RAM memory
   • Data processing: procesor follows the program's instructions and performs arithmetic/logical operations to transfrom them into information. Results are stored in the RAM memory
   • Output generation: information is displayed through an output device

2. Storage

   • When data are processed, arithmetic and logical operations create results. (Use of variables and costants)
     • Variable: identifier that represents the symbolic address of a memory location (where values in temporary way can be saved). PO Box has an identifying name and its content changes continuosly.
     • Constant: values that don't change during the problem resolution. (Identifier that represents the symblic address of a memory location that is permanent).

3. Assigning names

   • They can only contain alphabetic or numeric characters and underscore.
   • They need to start with an alphabetic character.
   • They should be meaningful (releated to the value)
   • They shouldn't be longer than 255 characters

4. Operators

   • Expression: bond of 2 operands through an operator.
     • Operand: constant value, variable or expression that executes the calculations.
     • Operators: specify the type of calculation with the elements of a formula (signs).
   • Arithmetic operators that calculate numerical values represented by constants, variables and expressions:
     • +,-,*,/,^,**,DIV,MOD
     • Priority operadors
       • 1: exponents, 2: multiplication-division, 3: DIV, 4: MOD, 5: addition-subtraction
       • From left to right

5. Myroslava Sánchez Andrade A01730712

Bilder und Dateien der Mindmap