Pseudocode

This is an important concept you should fully understand this.

This is a basic concept in computer science

Pseudocode is an informal high-level description of the operating principle of a computer program or other algorithm. It uses the structural conventions of a normal programming language, but is intended for human reading rather than machine reading.

Pseudocode is a simple way of writing programming code in English. Pseudocode is not actual programming language. It uses short phrases to write code for programs before you actually create it in a specific language. Once you know what the program is about and how it will function, then you can use pseudocode to create statements to achieve the required results for your program.

Common psuedocode verbs

Common Action Keywords

Several keywords are often used to indicate common input, output, and processing operations.

• Input: READ, OBTAIN, GET
• Output: PRINT, DISPLAY, SHOW
• Compute: COMPUTE, CALCULATE, DETERMINE
• Initialize: SET, INIT
• Add one: INCREMENT, BUMP

Examples of pseudocode

Example 1:

If student's grade is greater than or equal to 60

Print "passed"
else
Print "failed"

Question for you to think about:

• What do you notice about the structure of this code?
• Could you program this in Python or PHP?

Example 2:

Set total to zero

Set grade counter to one

While grade counter is less than or equal to ten

Input the next grade
Add the grade into the total
Set the class average to the total divided by ten

Print the class average.

What you must know

1. Review the python code below and then re-type it in pseudocode]]

Please paste this code into your Python IDE :

import random
secret_number = random.randint(0,100)
guess = 0
game = 1 
while True: 
    print("This is guess: " + str(guess))
    print("This is game: " + str(game))
    players_guess = input("I'm thinking of a number between 1 and 100. What is your guess: ")
    if players_guess == secret_number:
        print("You won!")
        play_again = raw_input("Do you want to play again (Y or N)? ")
        if play_again == "Y" or play_again == "y" or play_again == "yes":
            guess == 0
            game = game + 1
        else:    
            break
    elif players_guess < secret_number:
        print("This guess is to low.")
        guess = guess + 1
    elif players_guess > secret_number: 
         print("This guess is to high")
         guess = guess + 1

Why is this so important?

When you are first building a program, we don't really care about the actual LANGUAGE or SYNTAX you will use. Rather, we care about your logic. Pseudocode helps you by forcing you to think logically rather than about syntax.

an informal high-level description of the operating principle of a computer program or other algorithm.

A unit of abstract mathematical system subject to the laws of arithmetic.