subprogram statement

例句：

1. 1. The program uses a subroutine to handle user input.
   该程序使用子程序来处理用户输入。
2. 2.The subroutine is designed to perform specific tasks efficiently.
   这个子程序被设计用来高效地执行特定的任务。
3. 3. Subroutines are often used in complex programs to break down large tasks into smaller, more manageable parts.
   子程序在复杂的程序中经常被用来将大型任务分解成更小、更容易管理的组成部分。