Functions 1 Print() Prints what is inside the brackets Example: Print(“hello”) Would output: Hello
Variables Int (this is an integer whole number (i.e 1, 12, 108)) Float (this is a floating point number, has a decimal point (i.e 1.2, 104.299, 22.7)) Bool (known as a boolean, an expression that returns either true or false) String (anything between quotation marks, and alpha-numeric characters (ie a-z, 1-9, ?, etc)
Functions 2 type() Returns type of variable between brackets Example: type(1) Would output: int (“but remember it won't appear in the terminal unless is it stored inside a variable”)
Storing Variables Name on the left then an equals sign then what that variable equals Example 1: name = “Luke” print(name)
Outputs: Luke
Example 2: age = 42 print(age)
Outputs: 100
Example 3 Can also add to stored variables age = 42 age2 = age + 8
print(age) print(age2)
Comments Comments are denoted by a “#” at the beginning of a line, and basically tell the program to ‘skip this line’. They can be helpful reminders, instruction, or intention, or complete nonsense
Example: print(“bob”) #bob smells Output: bob
“”” All between the 3 quotes are comments “””
Input Asks the user to input some value. Could be a string, could be an int, float, etc Example: Input(“how old are you?”) In this case the input will be returning a string. 10 as an input would still be considered a string
If, elif, else if If this thing is true then do this Example: If 1 != 1: print(not the same)
Example 2 answer = int(Input (“what is 1 + 1?”)) If answer == 2: print(“correct”) Else: print(“better hit the books”)
*“answer” being a variable in this case
Example 3: name = input("what’s your name? ") if name == "John": print("hello John") elif name == "Julia": print("hola Julia") else: print("hello stranger")
Changing a variable's class speed = input("Enter the car's speed? ") speed = int(speed) if speed >= 100: print("Your speed is " +str(speed) +" please slow down") elif speed <= 50: print("Your speed is " +str(speed) +" please speed up") else: print("Your speed is good at " +str(speed)) Changes the variables class from a string, to an int (to check against the if statement) then back to a string to print.
Symbols = changes what is on the left to the right (equals this now) == is the value of the left side of the symbols ‘is equal to’ the right? (“is equal two”) != does not equal (the opposite of “is equal to”) <= equal to or less than
= equal to or greater than
Ctrl + C exits play mode
exit() to exit the terminal back to runing the script above