volatile variable - définition. Qu'est-ce que volatile variable
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Qu'est-ce (qui) est volatile variable - définition

TENDENCY OF A SUBSTANCE TO VAPORIZE
Volatility (physics); Volatile liquids; Volatilize; Volatilized; Volatile substance; Volatile substances
  • Normal boiling point (red) and melting point (blue) of linear alkanes vs. number of carbon atoms.
  • [[Bromine]] liquid readily transitions to vapor at room temperature, indicating a high volatility.
  • A crude oil distillation column.
  • A log-lin vapor pressure chart for various liquids

volatile variable      
<programming> A variable in a computer program which can be modified by processes other than the program. For example, a variable that stores the value of a timer chip (either because it is located at the address of the hardware device or because it is updated on interrupts) needs to be volatile to be useful. A static variable, on the other hand, maintains its value until the program changes it or it is no longer needed. In addition, volatile variables can be held in the stack whereas static variables are usually stored in a program's data segment. (1995-05-17)
volatile memory         
COMPUTER MEMORY THAT REQUIRES POWER TO MAINTAIN THE STORED INFORMATION; NEEDS CONSTANT POWER IN ORDER TO PREVENT DATA FROM BEING ERASED
Volatile storage
volatile storage         
COMPUTER MEMORY THAT REQUIRES POWER TO MAINTAIN THE STORED INFORMATION; NEEDS CONSTANT POWER IN ORDER TO PREVENT DATA FROM BEING ERASED
Volatile storage

Wikipédia

Volatility (chemistry)

In chemistry, volatility is a material quality which describes how readily a substance vaporizes. At a given temperature and pressure, a substance with high volatility is more likely to exist as a vapour, while a substance with low volatility is more likely to be a liquid or solid. Volatility can also describe the tendency of a vapor to condense into a liquid or solid; less volatile substances will more readily condense from a vapor than highly volatile ones. Differences in volatility can be observed by comparing how fast substances within a group evaporate (or sublimate in the case of solids) when exposed to the atmosphere. A highly volatile substance such as rubbing alcohol (isopropyl alcohol) will quickly evaporate, while a substance with low volatility such as vegetable oil will remain condensed. In general, solids are much less volatile than liquids, but there are some exceptions. Solids that sublimate (change directly from solid to vapor) such as dry ice (solid carbon dioxide) or iodine can vaporize at a similar rate as some liquids under standard conditions.