[WEBINAR] The New Normal: Dealing with the Reality of an Unsecure World

Volatile Variable

Definition - What does Volatile Variable mean?

A volatile variable is a variable that is marked or cast with the keyword "volatile" so that it is established that the variable can be changed by some outside factor, such as the operating system or other software. A volatile variable is useful in multithreaded applications or in other situations where programmers must anticipate changes to the variable other than those that are common within the code module.

Techopedia explains Volatile Variable

The volatile variable is useful in different programming languages, including parts of the "C suite" (C++, C, and C#) and in Java, a common programming language for the Web. The exact use of a volatile keyword or variable changes with regard to a particular programming language syntax, but generally, variables can be created as volatile, or conditionally declared volatile within code.

One popular use of the volatile keyword for a variable is in writing code to end a loop or terminate a thread. A programmer can write a simple function that will take in the volatile variable value and end the loop based on a given value. The volatile keyword ensures that the program gets a current value for a Boolean or other variable, instead of an obsolete one.

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
"Techopedia" on Twitter

Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Free Whitepaper: The Path to Hybrid Cloud
Free Whitepaper: The Path to Hybrid Cloud:
The Path to Hybrid Cloud: Intelligent Bursting To Amazon Web Services & Microsoft Azure
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.