What is subroutine with example in C?

Subroutines/Functions in C/C++ Subroutine/Function is a programming construct that allows a programmer to associate a given set of instructions with a specific name. A subroutine/function consist of a (unique) name and a (subroutine/function) body.

How do you write a subroutine?


  1. You do not need to declare the subroutine name in the main program as you do with a function name.
  2. They begin with a line that includes the word SUBROUTINE, the name of the subroutine, and the arguments for the subroutine.

What is subroutine example?

A routine or subroutine, also referred to as a function, procedure, method, and subprogram, is code called and executed anywhere in a program. For example, a routine may be used to save a file or display the time.

What is the syntax of subroutine?

Syntax. Here are some elaborations of the above syntax: The first line of a subroutine starts with the keyword SUBROUTINE, followed by that subroutine’s name. Following subroutine-name, there is a pair of parenthesis in which a number of arguments arg1, arg2., argn are separated with commas.

How subprogram in C are written and called?

  1. ▪ The subprogram sub is called from main with the call sub(w, x ,y, z), where w is.
  2. passed by value, x is passed by result, y is passed by value-result, and z is.
  3. passed by reference.
  4. ▪ Suppose a program contains two references to the constant 10, the first as an actual.
  5. corresponds to the 10 to the value 5.

How do you start a subroutine?

A Sub is a small chunk of code that you write to do a specific job. You can run this Sub by pressing F5 in the VBA Editor, you can run it by assigning the Sub to a button on a spreadsheet, and you can even run it from the menu bar at the top of the Editor.

Why do we use subroutines?

Subroutines make programs shorter as well as easier to read and understand, because they break program code into smaller sections. You can test procedures or functions separately, rather than having to test the whole program.

What does a subroutine do?

In computer programming, a subroutine is a sequence of program instructions that performs a specific task, packaged as a unit. This unit can then be used in programs wherever that particular task should be performed.

Why do we use subprograms?

Subprograms also provide modularity; that is, they let you break a program down into manageable, well-defined logic modules. This supports top-down design and the stepwise refinement approach to problem solving. Also, subprograms promote reusability and maintainability.