View source for Run time (program lifecycle phase)

In [[computer science]], '''run time''' ('''runtime''', '''execution time''') is the time during which a program is [[Execution (computing)|running]] (executing), in contrast to other phases of a program's lifecycle such as compile time, link time and load time.

== Errors ==

A run-time error is detected after or during the execution (running state) of a program, whereas a compile-time error is detected by the compiler before the program is ever executed.

== Features ==

[[Type checking]], [[register allocation]], [[code generation]], and [[code optimization]] are typically done at [[compile time]], but may be done at [[run time]] depending on the particular [[programming language]] and [[compiler]].

== See also ==

* [[Computer program]]
* [[Computer programming]]
* [[Computer science]] 
* [[Execution]]
* [[High-level programming language]]
* [[Programming language]]
* [[Run time]]
* [[Static programming language]]

== External links ==

* [https://en.wikipedia.org/wiki/Run_time_(program_lifecycle_phase) Run time (program lifecycle phase)] @ Wikipedia