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Python program to find greatest integer using floor() method
An example of floor() method in Python: Here, we are going to learn how to find the greatest integer using floor() method in Python?
By Anuj Singh Last updated : January 04, 2024
Problem statement
Input a float number, write a Python program to find greatest integer.
Greatest integer function
The greatest integer function is a function (real numbers function) to itself that is defined as follows: it sends any real number to the largest integer that is less than or equal to it.
The greatest integer function of 
is denoted by 
.
The greatest integer function is related to the fractional part (sometimes denoted 
) of the number as follows: for any 
, we have: 
More about greatest integer function: floor() and ceiling functions | wikipedia
Python program to find greatest integer using floor() method
# Python code to find greatest integer
# (Use of floor() method)
import math #importing class
num = float(input("Enter any float number: "))
print("math.floor(num): ", math.floor(num))
num = float(input("Enter another float number: "))
print("math.floor(num): ", math.floor(num))
Output
The output of the above example is:
Enter any float number: 56.892
math.floor(num): 56
Enter another float number: -34.567
math.floor(num): -35
To understand the above program, you should have the basic knowledge of the following Python topics:
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