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Python: round() function

round() function

The round() function returns the rounded floating point value number, rounded to ndigits digits after the decimal point. If ndigits is omitted, it defaults to zero.

Note: For the built-in types supporting round(), values are rounded to the closest multiple of 10 to the power minus ndigits; if two multiples are equally close, rounding is done toward the even choice (so, for example, both round(0.5) and round(-0.5) are 0, and round(1.5) is 2). The return value is an integer if called with one argument, otherwise of the same type as number.

Version:

(Python 3.2.5)

Syntax:

round(number[, ndigits])

Parameter:

Name Description Required /
Optional
number Number to be rounded. Required
ndigits The number of decimals to use. Default is 0 Optional

Return value:

Floating point value number.

Example-1: Python round() function

# for integers
print(round(5))

# for floating point
print(round(15.7))

# even choice
print(round(7.3))

Output:

5
16
7

Pictorial Presentation:

Python: Built-in-function - round() function

Pictorial Presentation:

Python: Built-in-function - round() function

Example-2: Python round() function

print(round(5.7754, 2))

# cannot be represented exactly as float
print(round(5.6758, 3))

Output:

5.78
5.676

Python Code Editor:

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How do I check if a list is empty?

For example, if passed the following:

a = []
if not a:
  print("List is empty")

Ref: https://bit.ly/2A4JXx9