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PYTHON PROGRAM • MODULES, DATES & REGULAR EXPRESSIONS

Perform Exact Decimal Addition in Python

Learn perform exact decimal addition in python with a short, executable Python example.

BeginnerDecimalPrecision

PROBLEM UNDERSTANDING

Input and expected output

Sample input
No input required
Sample output
0.3

COMPLETE PYTHON PROGRAM

Complete Python implementation

python-decimal-module.py
Open in compiler
from decimal import Decimal
print(Decimal('0.1') + Decimal('0.2'))

GUIDED CODE TOUR • NOT LIVE EXECUTION

Study the program line by line

Use the real compiler button above to run and debug with different inputs.

CURRENT STEP

Select Start to walk through the important lines.

SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

0.3
0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

  1. Import the required standard-library tools and prepare the sample data for perform exact decimal addition.
  2. Apply Decimal and Precision to compute the required result.
  3. Display the result for perform exact decimal addition and compare it with the documented sample output.

This example of perform exact decimal addition computes the result directly from the prepared sample data. It demonstrates Decimal and Precision and prints a deterministic result that can be checked against the sample output.

EFFICIENCY

Time and space complexity

Time complexity

O(1)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

Check this

For perform exact decimal addition, keep the data shape and value types consistent with Decimal.

Check this

Apply Decimal in the same order shown by the algorithm; changing the order can change the result.

Check this

Verify the final Decimal and Precision result against the sample before trying new data.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.