What are the three conditional statements?

Open-source software (OSS) is computer software with its source code made available with a license in which the copyright holder provides the rights to study, change, and distribute the software to anyone and for any purpose.

iCodeCamp is a great example of the open source community. All of our source code and materials are accessible for free from practically anywhere to be used for practically any purpose. Github is a platform that stores your code, but also lets other people access it and build off of it.

Today we are going to fork this project: https://github.com/icodecamp/module3_snake

This project uses an external dependency called pygame. Be sure to install pygame with python’s package manager by typing in pip install pygame in either terminal or GitBash.

What is Flow Control?

Conditional statements allow us to run some code only if a condition is met

if statements

if {BOOLEAN EXPRESSION}:
    {STATEMENTS}

example:

a = 5

if a == 5:
    print("a is 5")
    print("this will totally print")
    return
if a != 5:
    print("a is not five")
    print("this will totally not print")
    return

if else statements

if {BOOLEAN EXPRESSION}:
    {STATEMENTS_1}        # executed if condition evaluates to True
else:
    {STATEMENTS_2}        # executed if condition evaluates to False

example:

a = 5

if a == 5:
    print("a is 5")
    print("this will totally print")
    return
else:
    print("a is not five")
    print("this will totally not print")
    return

chained conditionals

if {BOOLEAN EXPRESSION1}:
    {STATEMENTS_A}
elif{BOOLEAN EXPRESSION2}:
  {STATEMENTS_B}
else:
    {STATEMENTS_C}

example:

a = 5

if a == 1:
    print("a is 1")
elif a != 300:
    print("a is not equal to 300")
elif a > 5:
    print("a is greater than 5")
elif a < 5:
    print("a is less than 5")
else:
    print("a is 5")

Project Snake

This project is an open source game in which a hungry snake roams around a field in search of sparkling food. Your task is to implement the conditional statements required to make the snake move around.

1. If you haven’t done so already, fork the project and clone it to your desktop
2. The project depends on an open source package called “pygame.” Use the command pip install pygame in either GitBash or Terminal to install it.
3. Open up the file snake.py in sublime text.
4. Notice that the first line of the file is import pygame this allows us to use the pygame in our game
5. Scroll to the bottom of the file. Fill in the missing segments using if, elif, and else statements. The function should either return move_up, move_down, move_left, or move_right.
6. Run the game by typing in python game.py in the directory of the project on either GitBash or Terminal

If you are having trouble with the code, you can find the solutions here