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Python round

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The Python round function is one of the Built-in Math functions used to round the specified expression or a specific number to the nearest integer. In this section, we discuss how to use round function in Python Programming language with example. 

The syntax of the round Function in Python Programming is

round(Number, Digits);

Number: It can be a number or a valid numerical expression.

  • If the number argument is a positive or negative number, the round function returns the nearest value.
  • If the number argument is not a number, the math round function returns TypeError.

Digits: This is an optional parameter. If you omit this argument, the round Function round the Number to the nearest integer value, otherwise, Number rounded to the decimal value specified in Digits arguments.

Python round Function Example

The Python round function rounds the number to the nearest integer. In this example, We are going to round the values of different data types and display the output

# Python round Function

Tup = (10.98, 20.26, 30.05, -40.95 , 50.85) # Tuple Declaration
Lis = [-10.98, 32.65, -39.29, -42.15 , -39.97] # List Declaration

print('round() Function on Positive Decimal = %.2f' %round(10.98763))
print('round() Function on Negative Decimal = %.2f' %round(-15.48476))

print('round() Function with Second argument = %.3f' %round(10.98763, 3))
print('round() Function with Second argument = %.3f' %round(-15.48476, 3))

print('round() Function on Tuple Item = %d' %round(Tup[2]))
print('round() Function on Tuple Item = %d' %round(Tup[4]))
print('round() Function on List Item = %d' %round(Lis[2]))
print('round() Function on List Item = %d' %round(Lis[4]))

print('round() Function on Multiple Number = %.2f' %round(10 + 20 - 40.6578, 2))

print('round() Function on String Value = ', round('2.95'))

OUTPUT

Python ROUND Function

ANALYSIS

  • In the first two statements of this program, We used the Python round Function directly on both the Positive decimals and negative decimals.
  • Next two statements, We used the round Function with two arguments, so the above statements round the given numbers to the nearest decimal value in the third position.
  • Following four statements, We used the round Function on Tuple and List items. If you observe the above Python screenshot, this Math function is working correctly on them.
  • Then, We tried Python round Function directly on multiple values.
  • Last, We tried round Function on the String value, and it returns TypeError as an output.