To round a number to the nearest 5 in Python, we can use ways like customizing a function using Python’s built-in functions and using the math.ceil() function.
Round a number to the nearest 5 in Python
Customize a function that returns the nearest 5 divisible values
I will customize a divisible function by the nearest 5 using the round() function.
Syntax:
round(number[, ndigits])
Parameters:
- number: Number you want to round.
- ndigits: The number of digits you want after the decimal point.
Return value from the round() function:
- If there are no ndigits, the function returns the nearest integer.
- If two arguments are provided, the function returns a number with ndigits decimal places after the decimal point.
Example:
# Use the round() function to round
def roundNearest5(x):
return 5 * round(x / 5)
print('The nearest rounded number is divisible by 5:', roundNearest5(1))
print('The nearest rounded number is divisible by 5:', roundNearest5(23))
print('The nearest rounded number is divisible by 5:', roundNearest5(12))Output:
The nearest rounded number is divisible by 5: 0
The nearest rounded number is divisible by 5: 25
The nearest rounded number is divisible by 5: 10In the above example, I instantiate a function that I named ’roundNearest5′ that returns the nearest divisible by 5 as follows: I use integer division (the / operator) as the round() parameter, and round() I don’t take any extra digits after the decimal point, so I always get an integer as a result. Multiply that result by 5 to get the nearest number that is divisible by 5.
You can also use the int() function in the ’roundNearest5′ function.
Example:
def roundNearest5(numParam, n = 5):
return int(numParam) - int(numParam) % n
print('The nearest rounded number is divisible by 5:', roundNearest5(1))
print('The nearest rounded number is divisible by 5:', roundNearest5(23))
print('The nearest rounded number is divisible by 5:', roundNearest5(12))Output:
The nearest rounded number is divisible by 5: 0
The nearest rounded number is divisible by 5: 20
The nearest rounded number is divisible by 5: 10In the above example, I instantiate a function I named ‘myRound’ that returns the nearest divisible by 5: I use remainder division (% operator) as the int() function parameter. The int() function with that parameter returns an integer value. Multiply that result by 5 to get the nearest number that is divisible by 5.
Use the math.ceil() function
Syntax:
math.ceil( x )
Parameters:
- x: A numeric expression.
The ceil() function returns the smallest integer that is not less than x.
Example:
- Import math module to call ceil() function.
- The ceil() function rounds the value from the function’s integer division. The result returned is an integer not less than the value of the division.
- Multiply that result by 5 to get the nearest number that is divisible by 5.
import math
# Ues the math.ceil() to round
def roundNearest5(numParam, n = 5):
return math.ceil(numParam / n) * n
print('The nearest rounded number is divisible by 5:', roundNearest5(1))
print('The nearest rounded number is divisible by 5:', roundNearest5(23))
print('The nearest rounded number is divisible by 5:', roundNearest5(12))Output:
The nearest rounded number is divisible by 5: 5
The nearest rounded number is divisible by 5: 25
The nearest rounded number is divisible by 5: 15Summary
Some of the methods above have shown you how to round a number to the nearest 5 in Python. Hope you got an idea for this topic. Thank you for taking the time to read it.
Maybe you are interested:
- Round a float to 2 decimals in python
- Round a number up to the nearest integer in python
- Check if a number is divisible by another number in Python
My name is Jason Wilson, you can call me Jason. My major is information technology, and I am proficient in C++, Python, and Java. I hope my writings are useful to you while you study programming languages.
Name of the university: HHAU
Major: IT
Programming Languages: C++, Python, Java
