Variables and Types

Introduction to Python

Hugo Bowne-Anderson

Data Scientist at DataCamp

Variable

  • Specific, case-sensitive name

  • Call up value through variable name

  • 1.79 m - 68.7 kg

height = 1.79
weight = 68.7

height

1.79
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Calculate BMI

height = 1.79
weight = 68.7

height

1.79

$$ \text{BMI} = \frac{\text{weight}}{\text{height}^2} $$

68.7 / 1.79 ** 2

21.4413

weight / height ** 2

21.4413

bmi = weight / height ** 2
bmi

21.4413
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Reproducibility

height = 1.79
weight = 68.7
bmi = weight / height ** 2
print(bmi)

21.4413
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Reproducibility

height = 1.79
weight = 74.2 # <-
bmi = weight / height ** 2
print(bmi)

23.1578
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Python Types

type(bmi)

float

day_of_week = 5
type(day_of_week)

int
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Python Types (2)

x = "body mass index"
y = 'this works too'

type(y)

str

z = True
type(z)

bool
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Python Types (3)

2 + 3

5

'ab' + 'cd'

'abcd'
  • Different type = different behavior!
Introduction to Python

Let's practice!

Introduction to Python

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