Subroutine ek programming term hai jo ek sequence of instructions ko represent karta hai, jo ki baar-baar reuse kiye ja sakte hain. Subroutine ko ek baar define kiya jaata hai aur phir baar-baar uska use kiya jaa sakta hai, jisse ki code ki length kam ho aur programming me flexibility aati hai. Subroutine ko ek alag se module ke roop me define kiya jaata hai jisse ki use dusre parts of the program se call kiya ja sakta hai. Jab subroutine ko call kiya jaata hai, tab control us subroutine me transfer ho jaata hai aur waha par define kiye gaye instructions execute hote hain. Subroutine ke execution ke baad, control phir se main program me transfer ho jaata hai jaha se subroutine call kiya gaya tha. Subroutine ka use programming me code reuse ke liye kiya jaata hai aur isse code ki readability, maintainability aur scalability improve ho jaati hai. Subroutine ka use complex programs me bahut jyada hota hai jaha par same functionality ke baar-baar use kiye jaane wale code snippets ko avoid kiya jaana chaahiye.
