01_variables.md

Variables

Strings

A string is a sequence of letters, numbers, and punctuation marks - or commonly known as text

In Python you can create a string by typing letters between single or double quotation marks.

city = 'San Fransico'
state = 'California'
print(city, state)

print(city + state)

print(city + ',' + state)

Numbers

Python can handle several types of numbers, but the two most common are:

• int, which represents integer values like 100, and
• float, which represents numbers that have a fraction part, like 0.5

population = 881549
latitude = 37.7739
longitude = -121.5687

print(type(population))

print(type(latitude))

elevation_feet = 934
elevation_meters = elevation_feet * 0.3048
print(elevation_meters)

area_sqmi = 46.89
density = population / area_sqmi
print(density)

Exercise

We have a variable named distance_km below with the value 4135 - indicating the straight-line distance between San Francisco and New York in Kilometers. Create another variable called distance_mi and store the distance value in miles.

• Hint1: 1 mile = 1.60934 kilometers

Add the code in the cell below and run it. The output should be 2569.37

distance_km = 4135
# Remove this line and add code here

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