Definition

Noun: A library routine is a pre-written, tested, and debugged subroutine or function that is stored in a program library. It is a reusable piece of code designed to perform a specific, common task, which can be called by different software programs to avoid the need for programmers to write the same code repeatedly.

Usage

A library routine is a fundamental component in software development, promoting code reuse, efficiency, and reliability. Programmers include or link to these routines from a library to add standard functionality to their programs.

Examples

• The programmer used a library routine to handle complex mathematical calculations, saving development time.
• Standard input/output operations are often performed by calling a library routine.
• Debugging is easier when you rely on well-tested library routines for common tasks.

Advanced Usage

• Dynamic Linking: A library routine can be linked to a program at runtime, reducing the initial program size.
• Static Library: A collection of library routines that are copied and embedded into the final executable program during compilation.

Variants and Related Words

• Subroutine: A sequence of program instructions that performs a specific task.
• Function: A subroutine that returns a value.
• Procedure: A subroutine, similar to a function but may not return a value.
• API (Application Programming Interface): A set of defined library routines, protocols, and tools for building software.

Synonyms

• Built-in function
• Standard function
• Predefined routine

Related Phrases

• Call a library routine: To invoke or execute a routine from a library within a program.
  • The application calls a library routine to sort the data.
• Link against a library: To connect a program to a library so it can use the library routines.
  • You must link against the math library to use those trigonometric functions.

Noun

1. a debugged routine that is maintained in a program library