Rounding Numbers

 

Round

round(number, digits(optional))

Rounds the float value to the given number of decimal digits.

digits

-> define the number of decimal digits to be considered for rounding.

• when not specified default is

  0

Code

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a = round(3.14,1)

print(a)

a = round(3.14)

print(a)

PYTHON

Output

3.1

3

Floating Point Approximation

Float values are stored approximately.

Code

print(0.1 + 0.2)

Output

0.30000000000000004

Floating Point Errors

Sometimes, floating point approximation gives unexpected results.

Code

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print((0.1 + 0.2) == 0.3)

PYTHON

Output

False

To avoid these unexpected results, we can use

round()

Code

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a = round((0.1 + 0.2), 1)

print(a)

print(a == 0.3)

PYTHON

Output

0.3

True

Comment starts with a hash

#

It can be written in its own line next to a statement of code.

Code

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n = 5

# Finding if Even

even = (n % 2 == 0)

print(even) # prints boolean value

PYTHON

Output

False