Routine and Subroutine: Definition and Key Differences

Routine and subroutine are two essential programming concepts that are often used interchangeably. However, they have distinct differences that set them apart. In this article, we will define routine and subroutine, highlight their differences, and explore their significance in programming.

What is a Routine?

A routine is a block of code that performs a specific task or set of tasks. It is a self-contained unit of code that can be executed multiple times. Routines are often used to break down large programs into smaller, more manageable parts. They can be called from other parts of the program or run independently.

Routines are commonly used to perform repetitive tasks such as input/output operations, error handling, and data validation. They can also be used to encapsulate complex algorithms or business logic. Routines can be written in any programming language and can be used in any type of program, from desktop applications to web applications.

What is a Subroutine?

A subroutine is a type of routine that is designed to perform a specific task and return a value to the calling program. Subroutines are also known as functions, methods, or procedures. They are used to break down complex programs into smaller, more manageable parts that can be reused in other parts of the program.

Subroutines are often used to perform calculations, manipulate data, or perform other tasks that require a specific set of instructions. They can be called from other parts of the program or run independently. Subroutines can be written in any programming language and can be used in any type of program, from desktop applications to web applications.

Key Differences between Routine and Subroutine

While routines and subroutines are similar in many ways, there are some key differences that set them apart:

• Purpose: Routines are designed to perform a specific task or set of tasks, while subroutines are designed to perform a specific task and return a value to the calling program.
• Control: Routines can be called from other parts of the program or run independently, while subroutines must be called from other parts of the program.
• Reuse: Routines can be reused in other parts of the program, while subroutines are designed to be reused in other parts of the program.
• Complexity: Subroutines are often used to break down complex programs into smaller, more manageable parts, while routines are used to perform repetitive tasks or encapsulate complex algorithms or business logic.

Significance in Programming

Routines and subroutines are essential programming concepts that are used in almost every program. They allow programmers to break down large programs into smaller, more manageable parts, making it easier to write, test, and maintain code. They also promote code reuse, which can save time and improve the overall quality of the code.

Both routines and subroutines can be used to improve the performance of a program by reducing the amount of code that needs to be executed. They can also be used to improve the readability of the code by making it easier to understand and follow.

In conclusion, routines and subroutines are fundamental programming concepts that every programmer should understand. By using them effectively, programmers can write better code, save time, and improve the overall quality of their programs.