How to write algorithms in pseudocode

Algorithm example[ edit ] An animation of the quicksort algorithm sorting an array of randomized values.

How to write algorithms in pseudocode

TG understands a dialect of the Logo programming language; it contains a Logo interpreter. She reads her pseudocode notes and converts them into Logo instructions in her head and types the instructions into the CommandCenter.

As each line is [Enter]-ed she watches the turtle do exactly what she expected. Looking Back Finally, our experienced programmer reviews what she has done. In this case she examines the graphics, asking herself Does the graphics my program produced match the drawing I set out to produce?

In other words, is her program correct? Looking at her instructions, her source codereflecting on her choice of approach, she asks herself Did I make the right choice of approach? If I were to write the program again, would I do it the same way?

What was the hardest part? Is there a way I could have made it simpler? Lastly, she will think about the code, comparing it in her mind with other similar programs she has written.

She will ask herself Is a pattern developing? Can any of the source code she has written be used in the future, to make a similar program easier?

Our experienced programmer is consolidating her knowledge of writing programs in Logo. This will help her in the future. I was taught to write my programs on paper first 44 years ago.

But, my interaction with a computer consisted of getting a little bit of time on a computer I shared with a hundred other programmers. So, use of paper and a pencil for writing programs was important. But, now everyone has their own computer Let's move on to take advantage of this and eliminate the use of paper and pencil for this step.

You will do this with TG's Editor.

how to write algorithms in pseudocode

Opening TG's Editor As of version. Simply type "editor" or the abbreviation "edit" into the CommandCenter on a line all by itself.

In the TG application, the menu system is readily available using the standard, pull-down stripe across the top. To access the menu system in the TG applet, position the mouse in the applet and hold down the right mouse button.

Position the mouse over the "Window" menu item to bring up its submenu, choose the "Editor" submenu, and finally choose its "Open" option. At this point, the height of the subwindows can be adjusted by positioning the mouse's icon over one of the name stripes, holding down the left mouse button, and dragging the name stripe up or down.

Since we are going to be using the Editor, make it a bit taller; first drag the CommandCenter name stripe up, then drag the Editor name stripe up. Well, this is a problem. We solve this problem by entering the pseudocode as comments.

Comments in Logo start with the semicolon ";" character and go through the end of the line. Comments are intended to be read by humans and are ignored by a Logo interpreter.

Saving the Contents of the Editor What if at this point, you need to go somewhere or do something else? If you are using the TG programming environment on this this web page there is nothing you can do other than copy what is on the display onto paper to take with you.

But if you have the TG programming environmnet on your computer you can save the contents of the Editor to a file on your computer.

What this window looks like and how you interact with it is different on different computers, e. Once the save is complete you can quit TG. A system dependent window will pop-up and you can use it to find and select the program you saved before. TG's Editor will open with the selected file's contents in it.

Under each comment, we convert the pseudocode into the appropriate Logo instructions. How do we get the Logo interpreter to perform the instructions we've typed into the Editor? The easiest way is to transfer focus out of the Editor. You may have noticed by now that the subwindow of TG you are interacting with, the one that has focus, is highlighted in black as opposed to gray.Oct 19,  · What are three ways to write algorithms and three types of instruction?

what is the difference between an algorithm and pseudocode? please explain with examples. anon Post I just want to know the steps in creating an algorithm.

From to , Professor Furman worked in the Development Laboratory at IBM, General Products Division (later called, Storage Systems Division) in San José. He was a member of the actuator development team for the disk storage product and spindle motor design team for inch and inch disk drive products.

While algorithms are generally written in a natural language or plain English language, pseudocode is written in a format that is similar to the structure of a high-level programming language. Program on the other hand allows us to write a code in a particular programming language. Writing pseudocode is a helpful technique when you get stuck, and is used by even the most experienced developers.

Pseudocode Examples

But what is it? In this training video, you'll learn how . In mathematics and computer science, an algorithm (/ ˈ æ l ɡ ə r ɪ ð əm / ()) is an unambiguous specification of how to solve a class of tranceformingnlp.comthms can perform calculation, data processing and automated reasoning tasks..

As an effective method, an algorithm can be expressed within a finite amount of space and time and in a well-defined formal language for calculating a function.

Learn Flowcharting and Pseudocode. Be a better programmer! + – Introduction: Course Objectives, definition of Flow Charts, Pseudocode, Algorithms, Computer Operations and Data Types. This lecture describes this structure and gives examples of how to flow chart and write pseudocode for sequential operations.

After the lecture, open the.

What is an Algorithm - Wikiversity