Precision Handling in Python
Python in its definition allows handling the precision of floating-point numbers in several ways using different functions. Most of them are defined under the “math” module. Some of the most used operations are discussed in this article.
- trunc():- This function is used to eliminate all decimal parts of the floating-point number and return the integer without the decimal part.
- ceil():- This function is used to print the least integer greater than the given number.
- floor():- This function is used to print the greatest integer smaller than the given integer.
# Python code to demonstrate ceil(), trunc()# and floor()# importing "math" for precision functionimport math# initializing valuea = 3.4536# using trunc() to print integer after truncatingprint("The integral value of number is : ", end="")print(math.trunc(a))# using ceil() to print number after ceilingprint("The smallest integer greater than number is : ", end="")print(math.ceil(a))# using floor() to print number after flooringprint("The greatest integer smaller than number is : ", end="")print(math.floor(a)) |
Output :
The integral value of number is : 3 The smallest integer greater than number is : 4 The greatest integer smaller than number is : 3
Setting Precision
There are many ways to set the precision of the floating-point values. Some of them are discussed below.
- Using “%”:- “%” operator is used to format as well as set precision in python. This is similar to “printf” statement in C programming.
- Using format():- This is yet another way to format the string for setting precision.
- Using round(x,n):- This function takes 2 arguments, number, and the number till which we want decimal part rounded.
# Python code to demonstrate precision# and round()# initializing valuea = 3.4536# using "%" to print value till 2 decimal placesprint ("The value of number till 2 decimal place(using %) is : ",end="")print ('%.2f'%a)# using format() to print value till 2 decimal placesprint ("The value of number till 2 decimal place(using format()) is : ",end="")print ("{0:.2f}".format(a))# using round() to print value till 2 decimal placesprint ("The value of number till 2 decimal place(using round()) is : ",end="")print (round(a,2)) |
Output :
The value of number till 2 decimal place(using %) is : 3.45 The value of number till 2 decimal place(using format()) is : 3.45 The value of number till 2 decimal place(using round()) is : 3.45
Last Updated on October 25, 2021 by admin