Difference between Program and Function

1. Program :
Program, as name suggest, are set or collection of instructions used by computer to execute specific task and these are created using particular programming languages such as C++, Python, Ruby, etc.

2. Function :
Function, as name suggests, is basic concept in computer programming that one calls to control flow of program as well as perform a specific task, returns a value and resumes program where it was called.

Difference between Program and Function :

Program	Function
Programs are set of instructions executed by computer.	Function is block of organized and reusable code.
Programs has to instruct computer to do particular task.	Functions has to perform action or related action.
Programs do not return any result.	Function usually return result that can be graphed or entered in table.
It provides framework that set direction of program as well as plan about how objective will be achieved.	It provides better modularity for application as well as high degree of reusing code.
It cannot store local and global variables.	It can store local and global variables.
Types of programs include system programs, application programs, utility programs, etc.	Types of function include modulus function, linear function, quadratic function, exponential function, etc.
Program consists of compiled code that run directly from computers operating system.	Functions can be used over and over again once it is defined.
It is larger in size and does not require scripting engine to run.	Functions are smaller in size as compared to programs.
Programs are written in both low-level and high-level programming languages and are human readable and writable.	Functions can be both low-level or top-level functions.