In computer programming, runtime references the period of time during which a program is running, as well as the environment that communicates between the hardware and operating system.
The runtime environment is specifically any software or instructions that are executed while a program is running. These instructions can include functions for optimization, memory management, debugging, and input/output.
A runtime error is effectively any error a program has after it has been executed. Developers can use runtime environments to test code for debugging runtime errors, before launching the program into production.
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