Basic Python Review Lesson

Displays any output to the console; can be math calculations and/or strings including text and number characters.

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​Print Function

Printing variables

When printing a variable, no quatation marks are used; Otherwise, it will print the variable name itself as a string.

age = 12
print(age)
Console will print 12.

​name = "Adam"
print("name")

The computer will print name, NOT Adam

Like a closet or storage box that you name and save data to be used later.

Variables

A variable that typically saves text, spaces, and characters. Can include numbers; Will always be surrounded by QUOTATION MARKS

​​Strings

​Positive and negative whole numbers including zero; Used for math calculations.

number_of_students = 12

​​Integers

​Positive and negative decimal numbers; Used for math calculations as well.

gas_price = 3.29

​​Floats

Converts whatever is enclosed in the ( ) to a string.

str(10) => "10"

str ( ) function

​Converts whatever is enclosed in the ( ) to an integer; If it's a decimal, it will round down.

int(3.5) => 3
int("3") = > 3

​​int ( ) function

Converts whatever is enclosed in the ( ) to a decimal;

float (3) => 3.0

​​float ( )

The Input Function or input ( )

A way to get someone to interact with the computer program and enter information that is saved to a variable.

name = input ("Hello, what is your name?" )

Your prompt goes in QUOTATIONS; so all data will be a string by default.

This will convert the entered data from a string to a float (decimal).

​float(int("prompt: "))

This will convert the entered data from a string to an integer.

​int(input("prompt))

Concatenation (Adding Strings and variables)

We can use the addition (+) operator to combine multiple strings and/or variables into one.

print(first_name + middle_name + last_name)
print("I am " + str(age) + " years old.")