Setting Precision in Python Using Decimal Module Last Updated : 01 Oct, 2020 Comments Improve Suggest changes 3 Likes Like Report The decimal module in Python can be used to set the precise value of a number. The default value of the Decimal module is up to 28 significant figures. However, it can be changed using getcontext().prec method. The below program demonstrates the use of decimal module by computing the square root of 2 numbers up to the default the number of places. Python3 # Import required modules import decimal # Create decimal object ob1 = decimal.Decimal(5).sqrt() ob2 = decimal.Decimal(7).sqrt() # Display value print(ob1) print(ob2) Output2.236067977499789696409173669 2.645751311064590590501615754 We can set the precision up to n significant figure. The decimal.getcontext().prec has to be declared in the global scope such that all the decimal objects can have n significant figures. Python3 # Import required module import decimal # Set precision to a fixed value decimal.getcontext().prec = 6 # Create Decimal object ob1 = decimal.Decimal(5).sqrt() ob2 = decimal.Decimal(7).sqrt() # Display value up to 6 significant figures print(ob1) print(ob2) Output2.23607 2.64575 Comment S sangy987 Follow 3 Improve S sangy987 Follow 3 Improve Article Tags : Misc Python python-utility Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 5 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 2 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 7 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 15+ min read StatsModel Library - Tutorial 3 min read Learning Model Building in Scikit-learn 8 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 7 min read Python | Build a REST API using Flask 3 min read How to Create a basic API using Django Rest Framework ? 4 min read Python PracticePython Quiz 1 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like