What is a Function in Programming?

A function is an essential component of computer programming. It is essential that new programmers understand what a function is and why they are used. This video will explain what a function is and why we use them.

[allanblack]

Very Informative. I like how you written/drawn everything down. I find writing things down helpful to remember things.

[alcap]

Calling the function with the value A. Perfect! Thanks

[ruleaus]

So a function is a block of code invisibly embedded inside the main program? To call a function means for the computer to call that block of code to be run with whatever values inputted?

[shafaqmalik]

thanks for this informative video and also your hands are so beautiful😅❤❤

[asmarali]

Nice video. I think the correction way to define a funtion using input and output as A and B respectively woudl be B = function (A)

[Retrofire-]

I cannot state definitively what a function IS, but I know that any potential definition must carry a few points:

* a function is generally attached to an identifier [for being reused]
* a function holds a set of statements [a code block]
* a function might accept certain input, to obtain a more precise output
* a function performs a specific task

[Retrofire-]

also, it is helpful to consider what programming would look like without* functions.. you would need to rewrite a single operation, no matter how large, ad Infinium to accommodate your desire to use those statements, with a single function you can turn what would otherwise be 500 rewritten code blocks into a single function, which might be referenced an infinite amount of times. the performance improvements are incalculable

[TheRojo]

In Tron, "function" is an offensive term for a program that seems unsophisticated, equivalent to our "simpleton", essentially.