PROGRAMMING IN PYTHON LETS LEARN SOME CODE TOGETHER!

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PYTHON CAN DO SIMPLE MATHS Python uses these symbols to do simple Maths, what do you think each one does? +-/*+-/*

Text of PROGRAMMING IN PYTHON LETS LEARN SOME CODE TOGETHER!

PROGRAMMING IN PYTHON LETS LEARN SOME CODE TOGETHER! CHALLENGE If you know how to make games in Python, your task it to surprise us with what you can come up with. If not we are going to create a few games together in Python now. PYTHON CAN DO SIMPLE MATHS Python uses these symbols to do simple Maths, what do you think each one does? +-/*+-/* VARIABLES Whats a variable? Something that is stored for later use and can be called if needed. Variables can be any data type. LETS GIVE IT A TRY STRINGS Variables can contain text too, these are called strings. We use quote marks to set what text the variable will hold. Variable = text LETS GIVE IT A TRY LETS MAKE OUR FIRST SIMPLE PROGRAM WHAT WILL IT DO? Together we will make a program to say hello and ask for a name. It will then use the name that is inputted to say, it is good to meet you (name). SHALL WE SHOW YOU WHAT YOU WILL BE CREATING? STEP 1 Click on File, New Window. This is the File Editor. Click Save and save it as Hello World in your user area. Make a folder called Python to put it in if you want. # TAGS A # tag can be used to write a comment to anyone who reads your code. Try this now, tell the reader what the program will be doing. PRINT COMMAND What do you think a print command might do? It prints whatever you ask it to onto the screen of the user. Just like strings the text needs to have quote marks around it but also needs to have brackets ( ) outside of them too. LETS GIVE IT A TRY BY NOW YOU SHOULD HAVE SOMETHING LIKE THIS # This program says hello and asks my name. print (Hello World) print (What is your name?) ADDING A VARIABLE Now we need a variable to hold a name value. INPUT COMMAND The input command will take what the user inputs into the program. It can be used to put inputted text into a variable. It looks like this: Name = input () LETS GIVE IT A TRY NOW WE CAN USE THE NAME TO SAY HELLO Try to work out how you might do this. You need the print command, the + symbol, the variable and the other symbols needed in each command e.g. ( ). BY NOW YOU SHOULD HAVE SOMETHING LIKE THIS # This program says hello and asks my name. print (Hello World) print (What is your name?) name = input() print (It is good to meet you, + name) LETS RUN THE PROGRAM! Save the program again. Click Run, Run Module. The program should start. If it errors there is a mistake in your code, try to fix it yourself, if you cant ask a friend, as a last resort ask a teacher. LETS MAKE A HARDER GAME WHAT WILL IT DO? This game will ask the users name and ask them to play a guess the number game. The user will have 6 guesses, but they will be told if they are guessing too high or low. Once they guess correctly it will tell them how many tries it took to get it correct. SHALL WE SHOW YOU WHAT YOU WILL BE CREATING? STEP 1 Click on File, New Window. This is the File Editor. Click Save and save it as Guess the Number in your user area. Make a folder called Python to put it in if you want. # TAG TIME Write a # tag comment to anyone who reads your code. IMPORT Type import random This imports several functions related to random numbers. We will come back to this later. VARIABLE Set a variable guessesTaken to 0. ASK FOR THEIR NAME Ask for their name and remember to tell the computer to add it to a variable called name using, input() SETTING THE NUMBER TO BE FOUND To do this we need a variable called number and the random statement again. Type in the following: number = random.randint (1, 20) This asks for the computer to import a random integer (number) between 1 and 20. BY NOW YOU SHOULD HAVE SOMETHING LIKE THIS # This program is a guess the number game. import random guessesTaken = 0 print (Hello! What is your name?) name = input() number = random.randint (1, 20) USE THE NAME VARIABLE Use the name variable to tell the player you are thinking of a number between 1 and 20. WHILE LOOPS What is a while loop? A while loop will perform an action (set by you) while a condition is being met (also set by you). We need a while loop that asks the player to take a guess while the number of guesses taken is less than 6. WHILE LOOPS while guessesTaken number: print (Your guess is too high) if guess == number: break == means equal to The if statements are indented by 4 spaces and the contents of the if statements by another 4 spaces. THE WHILE LOOP IS OVER! All code should now start without an indent. SO ONCE THE GUESS LIMIT IS REACHED, WHAT HAPPENS? IF THEY GUESSED CORRECTLY Think how we could use an if statement to do a command if they guessed correctly. if guess == number: WHAT WOULD THE COMPUTER DO? First we need the convert the number of guesses back into a string so we can display it for the user. How might we do this? guessesTaken = str(guessesTaken) THEN CONGRATULATE THEM AND TELL THEM THEIR GUESSES print (Good job, + name + ! You guessed the number in + guessesTaken + guesses!) IF THEY GUESSED INCORRECTLY Think how we could use an if statement to do a command if they guessed correctly. != means not equal to. if guess != number: WE CONVERT THE NUMBER VARIABLE This time we convert the random number chosen at the start into a string so we can display it. How might we do this? number = str(number) THEN TELL THEM THEY WERE NOT SUCCESSFUL! print (Nope, the number I was thinking of was + number) BY NOW YOU SHOULD HAVE SOMETHING LIKE THIS if guess == number: guessesTaken = str(guessesTaken) print (Good job, + name + ! You guessed the number in + guessesTaken + guesses!) Notice the indents! BY NOW YOU SHOULD HAVE SOMETHING LIKE THIS if guess != number: number = str(number) print (Nope, the number I was thinking of was + number) Notice the indents! CONGRATULATIONS YOU HAVE MADE YOUR GUESS THE NUMBER GAME! LETS RUN THE PROGRAM! Save the program again. Click Run, Run Module. The program should start. If it errors there is a mistake in your code, try to fix it yourself, if you cant ask a friend, as a last resort ask a teacher.